IODP SEDIS - Thesaurus -

se
USE	selenium

Sea Beam
USE	Seabeam

sea fan
USE	submarine fans

sea floor spreading
USE	sea-floor spreading

sea floors
USE	ocean floors

sea ice
RT	ice
	ice fields
	icebergs
	oceanography
	sea water

sea level
SN	Not a valid term for GeoRef. See sea-level changes.

Sea Mapping and Remote Characterization
USE	SeaMarc

sea mounts
USE	seamounts

Sea of Azof
USE	Azov Sea

Sea of Azov
USE	Azov Sea

Sea of Crises
BT	Moon
	.Sea of Crises
UF	Mare Crisium
SN	Also search Crisium.

Sea of Fertility
BT	Moon
	.Sea of Fertility
UF	Mare Fecunditatis

Sea of Galilee
BT	Asia
	.Middle East
	..Israel
	...Sea of Galilee
UF	Lake Kinneret
	Lake Tiberias
RT	Great Rift Valley
	Galilee Basin
SN	Freshwater lake lying in N part of the Great Rift Valley, Northern Israel.

Sea of Japan
USE	Japan Sea

Sea of Marmara region
BT	Asia
	.Middle East
	..Turkey
	...Sea of Marmara region
RT	Bosporus
SN	Also index Europe if applicable. Added to Thesaurus in 1981.

Sea of Nectar
BT	Moon
	.Sea of Nectar
UF	Mare Nectaris

Sea of Okhotsk
USE	Okhotsk Sea

Sea of Rains
BT	Moon
	.Sea of Rains
UF	Imbrium Basin
	Mare Imbrium
RT	Aristarchus

Sea of Serenity
BT	Moon
	.Sea of Serenity
UF	Mare Serenitatis

Sea of Tranquillity
BT	Moon
	.Sea of Tranquillity
UF	Mare Tranquillitatis

Sea of Waves
BT	Moon
	.Sea of Waves
UF	Mare Undarum

sea surface temperature
USE	sea-surface temperature

sea water
UF	seawater
RT	isotopes
	oceanography
	pH
	atmosphere
	marine geology
	ion exchange
	hydrochemistry
	brackish water
	paleosalinity
	salinity
	salt water
	brines
	desalinization
	salt
	density
	carbonate compensation depth
	chemical dispersion
	nepheloid layer
	halmyrolysis
	salt-water int
SN	Used for studies on the composition and properties of the water of the oceans. For ancient water, see sedimentation or geochemistry.

sea-floor spreading
UF	ocean-floor spreading
	sea floor spreading
	spreading concept
	spreading-floor hypothesis
RT	mantle
	accreting plate boundary
	geosynclines
	marine geology
	magnetic anomalies
	continental drift
	mid-ocean ridges
	crust
	heat flow
	Benioff zone
	Iceland Research Drilling Project
	expanding Earth
	fracture zones
	geotectonic maps
	mid-ocean ridge basalts
	Mohoro
SN	Used for topics related to the hypothesis that the oceanic crust is increasing by convective upwelling of magma along the mid-ocean ridges or world rift system.

sea-floor trench
USE	trenches

sea-level chang

sea-level changes
NT	regression
	transgression
RT	beach profiles
	continental shelf
	eustacy
	event stratigraphy
	Fischer plots
	geodesy
	glacial geology
	glaciation
	greenhouse effect
	highstands
	isostasy
	land bridges
	land loss
	levels
	lowstands
	neotectonics
	paleo-oceanography
	paleoecology
	paleogeography
	raised b
SN	Also search (transgression or regression) OR changes of level. Added to Thesaurus in 1995.

sea-surface temperature
UF	sea surface temperature
RT	oceanography
	marine geology
	temperature
	sea water
	surface properties
	global change
SN	Added to Thesaurus in 1998.

sea-water encroachment
USE	salt-water intrusion

sea-water intrusion
USE	salt-water intrusion

Seabeam
UF	Sea Beam
RT	instruments
	acoustical methods
	geophysical methods
	geophysical surveys
	seismic methods
	data processing
	bathymetry
	sonar methods
	marine methods
SN	Added to Thesaurus in 1989.

sealing
RT	cap rocks
	engineering geology
SN	Added to Thesaurus in 1981.

SeaMarc
UF	Sea Mapping and Remote Characterization
RT	acoustical methods
	geophysical methods
	geophysical surveys
	remote sensing
	satellite methods
	imagery
	marine methods
	image enhancement
SN	Acronym. Added to Thesaurus in 1989.

seamounts
UF	guyots
	sea mounts
RT	bottom features
	ocean floors

seams, coal
USE	coal seams

Searcy County Arkansas
BT	United States
	.Arkansas
	..Searcy County Arkansas

Searles Lake
RT	Inyo County California
	potash
	San Bernardino County California
	California
	trona
	Trona California
SN	Dry lake in NW San Bernardino and Inyo counties in S California. Source of potash and borates. Indexed with counties or regions as applicable.

seas, epeiric
USE	epicontinental seas

seas, epicontinental
USE	epicontinental seas

seas, marginal
USE	marginal seas

Seasat
RT	geophysical methods
	geophysical surveys
	marine geology
	oceanography
	remote sensing
	satellite methods
SN	Added to Thesaurus in 1985.

seasonal
SN	A valid term through 1977. After 1977, use seasonal variations.

seasonal variations
RT	annual variations
	magnetic field
	secular variations
	variations
SN	Before 1978, search seasonal AND variations.

seat clay
USE	underclay

seat earth
USE	underclay

Seattle Washington
BT	United States
	.Washington
	..King County Washington
	...Seattle Washington
SN	City on Puget Sound in W central Washington.

seawalls
RT	revetments
	riprap
	shorelines
	spillways

seawater
USE	sea water

seaweed
USE	Phaeophyta

Sebastian County Arkansas
BT	United States
	.Arkansas
	..Sebastian County Arkansas

Sebes Mountains
BT	Europe
	.Southern Europe
	..Romania
	...Transylvania
	....Sebes Mountains
SN	SW Transylvania.

Sebes Romania
BT	Europe
	.Southern Europe
	..Romania
	...Transylvania
	....Sebes Romania
SN	Town in Alba County in SW Transylvania, central Romania.

Sebkha de Tindouf
USE	Tindouf Basin

Sebkha el Melah
BT	Africa
	.North Africa
	..Tunisia
	...Sebkha el Melah

sebkha environment
BT	terrestrial environment
	.sebkha environment
UF	sabkha environment
RT	sedimentation
	depositional environment
	paleogeography
	hypersaline environment
	arid environment
	semi-arid environment
	playas
	salt marshes
	supratidal environment
SN	Before 1978, search sebkha.

Seboomook Formation
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Devonian
	....Lower Devonian
	.....Seboomook Formation
RT	Quebec
	Maine
SN	Added to Thesaurus in 1989.

secondary dispersion
RT	dispersion patterns
	mineral exploration
	primary dispersion

secondary ion mass spectroscopy
UF	SIMS
RT	spectroscopy
	mass spectroscopy
	chemical analysis
	ions
SN	Before 1993, also search secondary ion methods. Added to Thesaurus in 1993.

secondary magnetization
BT	magnetization
	.secondary magnetization
RT	remagnetization
SN	Added to Thesaurus in 1981.

secondary migration
RT	migration
	natural gas
	petroleum
SN	For migration of elastic waves use seismic migration. Added to Thesaurus in 1985.

secondary minerals
RT	amygdules
	minerals

secondary porosity
BT	porosity
	.secondary porosity
RT	physical properties
	sedimentary rocks
	sediments
	permeability
	porous materials
SN	Added to Thesaurus in 1989.

secondary recovery
BT	enhanced recovery
	.secondary recovery
RT	petroleum engineering
	fluid injection
	tertiary recovery
	petroleum
	recovery
	steam injection
	waterflooding

secondary structures
BT	sedimentary structures
	.secondary structures
NT	armored mud balls
	concretions
	cone-in-cone
	geodes
	microstylolites
	septaria
	stylolites
RT	primary structures
	nodules

secondary wave
USE	S-waves

sections
SN	No longer a valid term for GeoRef. As of 1993, see borehole sections, cross sections, pit sections, polished sections, stratotypes, thin sections, or type sections.

secular variations
UF	geomagnetic secular variation
RT	paleomagnetism
	magnetic field
	annual variations
	seasonal variations
	variations

Sedan France
BT	Europe
	.Western Europe
	..France
	...Ardennes France
	....Sedan France
RT	Ardennes
SN	City near Belgian border in NE Ardennes, NE France.

Sedgwick Basin
BT	United States
	.Kansas
	..Sedgwick Basin
SN	S central Kansas.

Sedgwick County Colorado
BT	United States
	.Colorado
	..Sedgwick County Colorado
SN	Extreme NE Colorado.

Sedgwick County Kansas
BT	United States
	.Kansas
	..Sedgwick County Kansas
NT	Wichita Kansas
SN	S Kansas.

sediment budget
USE	bedload

sediment load
USE	bedload

sediment supply
RT	controls
	hydrology
	sedimentation
	supply
SN	Added to Thesaurus in 1993.

sediment transport
RT	beach profiles
	erosion rates
	flume studies
	glacial transport
	gravel-bed streams
	ice rafting
	laminar flow
	littoral cells
	marine transport
	saltation
	sedimentation
	settling
	stream transport
	suspension
	transport
	turbidity currents
	wind transport
SN	Reintroduced. Before 1993, also search transport AND sedimentation. A valid term before 1976. Added to Thesaurus in 1993.

sediment traps
RT	hydrology
	instruments
	oceanography
	samplers
	sampling
	sedimentation
	sediments
	suspended materials
SN	Added to Thesaurus in 1985.

sediment yield
RT	erosion
	GLEAMS
	runoff
	sediments
	streams
	yields

sediment-water interface
UF	interface, sediment-water
RT	sedimentation
	interfaces
	water
	sediments
	mineral-water interface
	water-rock interaction
SN	Before 1978, search interface AND sediment-water.

sedimenta

sedimentary basins
BT	basins
	.sedimentary basins
RT	paleogeography
	basin analysis
	foreland basins
	piggyback basins
SN	Term should be used in paleogeographic papers, not for recent basins.

sedimentary bodies
RT	sedimentary rocks
	sedimentation
	sediments
SN	Added to Thesaurus in 1981.

sedimentary cover
UF	cover, sedimentary
RT	tectonics
	basement
	cover tectonics
	overburden
	regolith

sedimentary environment
USE	depositional environment

sedimentary fault
USE	growth faults

sedimentary petrology
RT	bibliography
	catalogs
	clay mineralogy
	diagenesis
	domains
	flume studies
	glossaries
	lexicons
	marine geology
	microscope methods
	oceanography
	petrology
	sedimentary rocks
	sedimentary structures
	sedimentation
	sedimentology
	sediments
	shape analysis
SN	Used for the discipline as a whole.

Sedimentary Petrology (category)
SN	Sedimentary petrology, GeoRef category code 06, is one of thirty categories used to classify documents in GeoRef. Each reference in GeoRef is assigned one or more categories. Categories can be used, in addition to Terms, to refine searches (See List A.).

sedimentary processes
SN	No longer a valid term for GeoRef. After 1997, use specific process. Used for economic papers only.

sedimentary quartzite
USE	orthoquartzite

sedimentary rocks
NT	bone beds
	carbonate rocks
	caustobiolith
	chemically precipitated rocks
	clastic rocks
	coal
	gas sands
	grapestone
	oil sands
	oil shale
	torbanite
	tripoli
RT	agglomerate
	anhydrite
	arenaceous texture
	argillaceous texture
	arkosic composition
	authigenesis
	bauxite
	boulders
	calcareous composition
	catagenesis
	cement
	chemical properties
	clasts
	clay mineralogy
	coarse-grained materials
	concretions
	contourite
	diagenesis
SN	For description of hierarchy see List I.

sedimentary structures
NT	bedding plane irregularities
	biogenic structures
	cylindrical structures
	planar bedding structures
	primary structures
	rhizoliths
	secondary structures
	seismites
	soft sediment deformation
	sole marks
	turbidity current structures
RT	bioerosion
	borings
	boudinage
	burrows
	casts
	channels
	coprolites
	deposition
	diagenesis
	ergs
	fluvial features
	furrows
	glacial geology
	hardground
	intraformational structures
	mounds
	nodules
	paleogeography
	reefs
	sedimentary petrology
	sedimentary rocks
	sedimenta
SN	Used for a structure in a sedimentary rock or sediment, formed either contemporaneously with deposition (primary) or subsequently to deposition (secondary). See list K for types and names of structures.

sedimentati

sedimentation
NT	biochemical sedimentation
	bioclastic sedimentation
	chemical sedimentation
	coastal sedimentation
	continental margin sedimentation
	deep-sea sedimentation
	deltaic sedimentation
	detrital sedimentation
	estuarine sedimentation
	fluvial sedimentation
	fresh-water sedimentation
	glacial sedimentation
	intertidal sedimentation
	lacustrine sedimentation
	lagoonal sedimentation
	marine sedimentation
	nearshore sedimentation
	paludal sedimentation
	pelagic sedimentation
	terrestrial sedimentation
RT	ablation
	accretion
	aquatic environment
	artificial islands
	At
SN	Used for the act or process of forming or accumulating sediment in layers, including all processes from transport through diagenesis. Before 1998, if applicable, also search sedimentary processes which was chiefly used for economic studies. Before 1976, a

sedimentation rates
UF	rate of sedimentation
RT	sedimentation
	settling
	rates
SN	Before 1982, search sedimentation AND rates. Added to Thesaurus in 1982.

sedimentology
RT	decompaction
	marine geology
	sedimentary petrology
	sedimentary rocks
	geomorphology
	sedimentation
	sediments
SN	For the discipline.

sediments
NT	carbonate sediments
	clastic sediments
	guano
	gyttja
	marine sediments
	peat
RT	amygdules
	anhydrite
	arenaceous texture
	argillaceous texture
	arkosic composition
	ash flows
	bedload
	biofacies
	breccia
	calcareous composition
	cement
	chemical properties
	clasts
	clay mineralogy
	coarse-grained materials
	compactness
	concretions
	contourite
	dehydr
SN	Used for unconsolidated solid fragmental material, or a mass of such material, that originates from weathering of rocks. See List N.

seeds
RT	Angiospermae
	cones
	flight
	Gymnospermae
	lignin
	paleobotany
	Plantae
	wings

Seeland
USE	Zealand

seepage
UF	leakage
RT	drainage
	ground water
	aquitards
	leaky aquifers
	reservoirs
	petroleum
	foundations
	oil seeps
	nuclear facilities
	cold seeps
	gas seeps
	geomembranes
	geotextiles
	leaking underground storage tanks
	far-field
	near-field
	infiltrometers
	percolation
	leachate
	engineeri
SN	Use cold seeps, gas seeps, or oil seeps if applicable.

seeps, cold
USE	cold seeps

seeps, gas
USE	gas seeps

seeps, oil
USE	oil seeps

SEG
SN	Not a valid term for GeoRef. See Society of Exploration Geophysicists or Society of Economic Geologists if applicable.

segmentation
RT	Arthropoda
	drainage patterns
	faults
	fracture zones
	lagoons
SN	Used as a general term applicable to a variety of subjects including faults, fracture zones, lagoon subdivision, drainage patterns, and arthropod bodies. Added to Thesaurus in 1989.

Segovia Spain
BT	Europe
	.Southern Europe
	..Iberian Peninsula
	...Spain
	....Castilla y Leon Spain
	.....Segovia Spain
RT	Castile Spain
	Old Castile Spain
	Sierra de Guadarrama
SN	Province in central Spain.

Segozero
BT	Commonwealth of Independent States
	.Russian Federation
	..Karelia Russian Federation
	...Segozero
RT	Karelia
SN	Lake in S central Karelian Automomous Republic in NW European Russian Federation. This term has multiple hierarchies.

Segre Valley
RT	Lerida Spain
SN	River valley in Catalonia, Spain. Also search Segre; Segre River. Indexed with Spain if applicable.

segregation
RT	crystal fractionation
	fractional crystallization
	magmas
	phase equilibria
	geochemistry
SN	Added to Thesaurus in 1981.

seiches
RT	lakes
	limnology
	ocean waves
	waves

Seiland
BT	Europe
	.Western Europe
	..Scandinavia
	...Norway
	....Finnmark Norway
	.....Seiland
SN	Island in Arctic Ocean off NW Finnmark.

Seine
BT	Europe
	.Western Europe
	..France
	...Seine
RT	Paris France
SN	Former department which constituted Paris proper and a ring of industrial and residential suburbs. Department officially abolished January 1, 1960.

Seine Estuary
BT	Europe
	.Western Europe
	..France
	...Seine Estuary
RT	Calvados France
	Seine-Maritime France
	Eure France
SN	The tidal mouth of the Seine River emptying into the Bay of the Seine at Le Havre. Indexed with departments as applicable.

Seine River
BT	Europe
	.Western Europe
	..France
	...Seine River
RT	Seine Valley
SN	Rises in Cote-d'Or Department in E and flows NW through Paris and into the English Channel near Le Havre.

Seine Valley
BT	Europe
	.Western Europe
	..France
	...Seine Valley
RT	Seine River
SN	River valley in N central and N France.

Seine-et-Marne France
BT	Europe
	.Western Europe
	..France
	...Seine-et-Marne France
NT	Fontainebleau France
RT	Yonne Valley
SN	Department in N central France.

Seine-et-Oise
BT	Europe
	.Western Europe
	..France
	...Seine-et-Oise
RT	Paris France
SN	Former department outside Paris suburbs which completely surrounded former Seine Department. Officially abolished January 1, 1968.

Seine-Maritime France
BT	Europe
	.Western Europe
	..France
	...Seine-Maritime France
NT	Caux
	Dieppe France
	Le Havre France
	Rouen France
RT	Normandy
	Seine Estuary
SN	Department in NW France.

Seine-Saint-Denis France
BT	Europe
	.Western Europe
	..France
	...Seine-Saint-Denis France
SN	Department in N France.

Seislog
RT	instruments
	inverse problem
	seismic logging
	seismic methods
	well-logging

seismic

seismic attributes
SN	Not a valid term for GeoRef. If applicable, index specific attributes and hydrocarbon indicators. See seismology or seismic methods.

seismic coherency
UF	coherency, seismic
RT	seismology
	geophysical methods
	properties
	seismic methods
	wave dispersion
	frequency
	propagation
	frequency domain analysis
	wave fields
SN	Also index seismology and/or seismic methods.

seismic data
SN	A valid term through 1977. Use data and earthquakes.

seismic discontinuities
USE	discontinuities

seismic effects
SN	A valid term through 1977. Use effects and earthquakes.

seismic energy
RT	earthquakes
	energy
	seismology
SN	Energy produced by earthquakes. Added to Thesaurus in 1981.

seismic exploration
SN	Not a valid GeoRef index term after 1971. Used in subfiles G and N. Now use seismic methods, or seismic logging.

seismic focus
USE	focus

seismic gaps
RT	active faults
	earthquake prediction
	earthquakes
	faults
	seismic quiescence
	seismicity
	seismology
	seismotectonics
SN	Added to Thesaurus in 1985.

seismic intensity
RT	amplitude
	earthquakes
	intensity
	magnitude
	modified Mercalli scale
	Richter Scale
	seismology
SN	Added to Thesaurus in 1981.

seismic logging
BT	well-logging
	.seismic logging
RT	acoustical logging
	impedance
	tube waves
	seismic methods
	Seislog
	vertical seismic profiles
SN	Added to Thesaurus in 1984.

seismic methods
BT	geophysical methods
	.seismic methods
NT	bottom-simulating reflectors
	hydrocarbon indicators
RT	air guns
	backscattering
	Doppler effect
	geophones
	geophysical surveys
	elastic waves
	filters
	AVO methods
	dip moveout
	crust
	BIRPS
	deep seismic sounding
	explosions
	crosshole methods
	CALCRUST
	COCORP
	COCRUST
	ECORS
	DEKORP
	frequency domain analysis
	far-field
	GEOS
SN	For surveys, search with geophysical surveys and an area. For surveys, also index geophysical surveys and the area.

seismic migration
NT	poststack migration
	prestack migration
UF	migration (seismic)
RT	seismology
	seismic methods
	arrival time
	dip moveout
	raypaths
	imagery
	migration
	diffraction
	inverse problem
	Kirchhoff integral
	finite difference analysis
	wave fields
SN	Inversion operation for rearranging seismic information to plot reflections and diffractions at their true locations. Before 1993, also search migration AND seismic methods. Added to Thesaurus in 1993.

seismic moment
RT	displacements
	earthquakes
	faults
	moment tensors
	seismology
	shear modulus
SN	Added to Thesaurus in 1981.

seismic moment tensors
USE	moment tensors

seismic networks
NT	TERRAscope
RT	arrays
	geophysical methods
	geophysical surveys
	GEOS
	IRIS network
	LASA
	networks
	NORESS
	NORSAR
	PANDA
	PASSCAL
	portable arrays
	seismic methods
	seismology
	SMART2
SN	Before 1993, also search arrays OR networks with seismic methods OR seismology. Added to Thesaurus in 1993.

seismic noise
SN	A valid term through 1978. After 1978, use noise.

seismic profiles
BT	geophysical profiles
	.seismic profiles
NT	vertical seismic profiles
RT	seismic methods
	ECORS
	Lithoprobe
SN	Added to Thesaurus in 1985.

seismic quiescence
UF	quiescence, seismic
RT	earthquakes
	seismic gaps
	seismicity
	volcanic earthquakes
SN	Also search quiescence with seismicity or earthquakes. See seismic gaps if applicable. Also index seismic gaps if applicable. Added to Thesaurus in 1995.

seismic reflection profiles
SN	Not a valid term for GeoRef. As of 1989, use seismic profiles in combination with reflection.

seismic response
RT	acceleration
	aseismic design
	coseismic processes
	dams
	earthquakes
	foundations
	highways
	marine installations
	microzonation
	nuclear facilities
	railroads
	reservoirs
	engineering geology
	seismic risk
	seismology
	soil mechanics
	soil-structure interface
	tunnels
	u
SN	Response of a man-made structure to an earthquake. Added to Thesaurus in 1981.

seismic risk
UF	risk, seismic
RT	seismic response
	engineering geology
	geologic hazards
	safety
	nuclear facilities
	microzonation
	seismic zoning
	public awareness

seismic sea waves
USE	tsunamis

seismic sounding
USE	deep seismic sounding

seismic sources
UF	sources, seismic
RT	seismology
	earthquakes
	elastic waves
	explosions
	spalling
	wavelets
	vibrators
	waveforms

seismic stratigraphy
UF	seismostratigraphy
RT	seismic methods
	stratigraphy
	hydrocarbon indicators
	sequence stratigraphy
	lithofacies
	lithostratigraphy
SN	Added to Thesaurus in 1985.

seismic studies
SN	A valid term through 1976. Use seismic methods and theoretical studies or experimental studies.

seismic surge
USE	tsunamis

seismic survey maps
BT	maps
	.seismic survey maps
RT	geophysical survey maps
	seismic methods
SN	Also search maps AND geophysical surveys AND seismic methods with area. Added to Thesaurus in 1985.

seismic wavelets
USE	wavelets

seismic waves
BT	elastic waves
	.seismic waves
NT	body waves
	surface waves
UF	Earth waves
RT	Airy waves
	short-period waves
	long-period waves
SN	Restricted to solid-earth waves; for the seismic sea wave, use tsunamis. From 1976-1997, elastic waves was used.

seismic zones
USE	seismic zoning

seismic zoning
UF	seismic zones
RT	seismology
	earthquakes
	engineering geology
	environmental geology
	zoning
	microzonation
	seismic risk
	seismicity maps
	seismotectonic maps
SN	Added to Thesaurus in 1981.

seismicity
UF	microseismicity
RT	seismology
	seismic gaps
	paleoseismicity
	coupling
	intraplate processes
	seismotectonics
	seismic quiescence
	seismicity maps

seismicity maps
BT	maps
	.seismicity maps
RT	seismology
	seismicity
	seismic zoning
	seismotectonic maps
SN	Added to Thesaurus in 1982.

seismite
USE	seismites

seismites
BT	sedimentary structures
	.seismites
UF	seismite
RT	earthquakes
	paleoseismicity
	soft sediment deformation
	synsedimentary processes
SN	Structures thought to be produced by earthquakes. Also index soft sediment deformation if applicable (See list K).

seismo

seismograms
NT	numerical seismograms
	synthetic seismograms
	theoretical seismograms
UF	earthquake record
RT	seismology
	earthquakes
	TERRAscope
	coda waves
	seismographs
	spectral analysis
	signal-to-noise ratio
	vertical seismic profiles

seismographs
NT	electromagnetic seismographs
	horizontal-component seismographs
	inertial seismographs
	long-period seismographs
	ocean bottom seismographs
	short-period seismographs
	strain seismographs
	three-component seismographs
	vertical-component seismographs
UF	seismometers
RT	seismology
	instruments
	earthquakes
	geophones
	LASA
	seismograms
	high-level mode
	spheroidal mode
	toroidal mode

seismology
RT	410-km discontinuity
	670-km discontinuity
	accelerograms
	accelerometers
	acoustical emissions
	acoustical properties
	acoustical waves
	aftershocks
	Airy waves
	amplitude
	amplitude distortion
	anelastic materials
	anelasticity
	anisotropy
	arrival time
	attenuation
	b
SN	Used for the discipline as a whole as well as topics pertaining to seismology.

Seismology (category)
SN	Seismology, GeoRef category code 19, is one of thirty categories used to classify documents in GeoRef. Each reference in GeoRef is assigned one or more categories. Categories can be used, in addition to Terms, to refine searches (See List A.).

seismometers
USE	seismographs

seismostratigraphy
USE	seismic stratigraphy

seismotectonic maps
BT	maps
	.seismotectonic maps
RT	seismology
	tectonics
	tectonic maps
	seismic zoning
	seismotectonics
	seismicity maps
SN	Before 1981, search seismotectonics AND maps. Added to Thesaurus in 1981.

seismotectonics
BT	tectonics
	.seismotectonics
RT	seismology
	plate tectonics
	seismic gaps
	paleoseismicity
	seismicity
	seismotectonic maps
SN	The earthquake-related aspects of tectonics.

Selachii
BT	Chordata
	.Vertebrata
	..Pisces
	...Chondrichthyes
	....Elasmobranchii
	.....Selachii
NT	Galeoidea
SN	Order.

Selandian
BT	Chronostratigraphic Units
	.Phanerozoic
	..Cenozoic
	...Paleogene
	....Paleocene
	.....Selandian

Selangor Malaysia
BT	Asia
	.Far East
	..Malaysia
	...West Malaysia
	....Selangor Malaysia
NT	Kuala Lumpur Malaysia
SN	State on W coast of Malay Peninsula in West Malaysia. This term has multiple hierarchies.

selection, natural

selenates
RT	minerals
SN	Before 1981, search selenates and selenites.

selenates and selenites
SN	As of 1981, no longer a valid term for GeoRef. Use selenates or selenites as applicable.

Selenga Mongolia
BT	Asia
	.Far East
	..Mongolia
	...Selenga Mongolia
UF	Selenge
SN	Province on the Buryat border in N Mongolia.

Selenga River valley
BT	Asia
	.Selenga River valley
UF	Selenge River valley
RT	Russian Federation
	Mongolia
SN	Extends to SE Lake Baikal in Russian Federation. Indexed with countries as applicable.

Selenge
USE	Selenga Mongolia

Selenge River valley
USE	Selenga River valley

selenides
NT	eskebornite
	umangite
RT	minerals

selenite
BT	sulfates
	.selenite
RT	gypsum
SN	Used for the variety of gypsum. Not related to the group name, selenites.

selenites
NT	onofrite
RT	minerals
SN	Before 1981, search selenates and selenites.

selenium
UF	se
RT	lithophile elements
	chalcophile elements
	chemical elements
	onofrite

Selennyakh River
BT	Commonwealth of Independent States
	.Russian Federation
	..Yakutia Russian Federation
	...Selennyakh River
UF	Selenyak River
SN	River which rises in the N Cherskiy Range and flows into the Indigirka River in NE Yakutia. This term has multiple hierarchies.

selenodesy
RT	geodesy
	geoid
	Moon

Selenyak River
USE	Selennyakh River

self reversal
USE	reversals

self-organization
RT	artificial intelligence
	data processing
	fractals
	patterns
	properties
	scale factor
	systems
	systems analysis
SN	Added to Thesaurus in 1995.

self-potential methods
BT	geophysical methods
	.electrical methods
	..self-potential methods
UF	spontaneous polarization
	spontaneous potential
RT	well-logging
	geophysical surveys
SN	Before 1978, also search self-potential.

self-reversals
USE	reversals

self-similarity
RT	fractals
	heterogeneity
	models
	patterns
	properties
	scale factor
	scale models
	systems
SN	Added to Thesaurus in 1995.

Seligdar Russian Federation
BT	Commonwealth of Independent States
	.Russian Federation
	..Yakutia Russian Federation
	...Seligdar Russian Federation
SN	Town in SE Yakutia. Before 1993, Seligdar Russian Republic was also used. This term has multiple hierarchies.

seligmannite
BT	sulfosalts
	.sulfarsenites
	..seligmannite

Selkirk Mountains
BT	North America
	.Rocky Mountains
	..Selkirk Mountains
NT	Esplanade Range
UF	Selkirks Mountains
RT	U. S. Rocky Mountains
	Washington
	British Columbia
	Canadian Rocky Mountains
	Bonner County Idaho
	Boundary County Idaho
	Glacier National Park
SN	Range in the Rocky Mountains in SE British Columbia extending into N Idaho and Washington. Indexed with province or state and county AND U. S. Rocky Mountains or Canadian Rocky Mountains as applicable.

Selkirks Mountains
USE	Selkirk Mountains

Sellafield England
BT	Europe
	.Western Europe
	..United Kingdom
	...Great Britain
	....England
	.....Cumbria England
	......Sellafield England
UF	Windscale Plant
RT	nuclear facilities
SN	Site of nuclear power plant and waste disposal site near village of Seascale, Cumbria, NW England. Also search Windscale.

Selma Group
BT	Chronostratigraphic Units
	.Phanerozoic
	..Mesozoic
	...Cretaceous
	....Upper Cretaceous
	.....Selma Group
RT	Mississippi
	Alabama
	Blufftown Formation
	Tennessee
	Eutaw Formation
	Mooreville Chalk
	Prairie Bluff Chalk
	Ripley Formation
SN	Alabama, Mississippi and Tennessee. Added to Thesaurus in 1985.

Selukwe Zimbabwe
BT	Africa
	.Southern Africa
	..Zimbabwe
	...Selukwe Zimbabwe
SN	Town in central Zimbabwe.

Selva
SN	Not a valid term for GeoRef. See Copiapo Chile. Also may be used in other locations.

Selway-Bitterroot Wilderness
BT	United States
	.Selway-Bitterroot Wilderness
RT	Idaho
	Montana
	Bitterroot Range
	wilderness areas
	Idaho County Idaho
	Missoula County Montana
	Ravalli County Montana
SN	E Idaho and W Montana. Indexed with states and counties as applicable. Added to Thesaurus in 1985.

Selwyn Basin
BT	Canada
	.Western Canada
	..Yukon Territory
	...Selwyn Basin
RT	Canadian Rocky Mountains
	Selwyn Mountains
SN	E central Yukon Territory, Canada. Added to Thesaurus in 1985.

Selwyn Mountains
BT	Canada
	.Selwyn Mountains
RT	Yukon Territory
	Northwest Territories
	Selwyn Basin
	Selwyn Range
SN	On border of Yukon Territory and Northwest Territories, W of the Mackenzie Mountains. Indexed with provinces as applicable. Added to Thesaurus in 1981.

Selwyn Range
BT	Australasia
	.Australia
	..Queensland Australia
	...Selwyn Range
RT	Selwyn Mountains
SN	W central Queensland.

SEM data
UF	scanning electron microscopy data
RT	electron microscopy
	data
	electron microscopy data
	scanning electron microscopy
	TEM data
	transmission electron microscopy
SN	For the method, see scanning electron microscopy.

Semail Ophiolite
UF	Oman Ophiolite
	Samail Ophiolite
	Sumail Ophiolite
RT	Cretaceous
	United Arab Emirates
	Oman
	Oman Mountains
SN	Oman Mountains, N and E Oman. Added to Thesaurus in 1989.

Semarkona Meteorite
BT	meteorites
	.stony meteorites
	..chondrites
	...LL chondrites
	....Semarkona Meteorite
RT	India
	Madhya Pradesh India
SN	Impact in Chhindwara District, Madhya Pradesh, India. Added to Thesaurus in 1989.

Semata Formation
BT	Chronostratigraphic Units
	.Phanerozoic
	..Cenozoic
	...Quarternary
	....Pleistocene
	.....Semata Formation
RT	Japan

Semenic Mountains
BT	Europe
	.Southern Europe
	..Romania
	...Semenic Mountains
RT	Banat
SN	Central Banat. Also search Semenic.

semi-arid environment
BT	terrestrial environment
	.semi-arid environment
UF	semiarid regions
RT	ecology
	geomorphology
	depositional environment
	climate
	arid environment
	sebkha environment
SN	Before 1978, also search semi-arid; semiarid.

semi-infinite models
RT	infinite models
	mathematical models
	models
SN	Added to Thesaurus in 1981.

semi-variograms
USE	semivariograms

semiarid regions
USE	semi-arid environment

semifusinite
BT	macerals
	.inertinite
	..semifusinite
RT	vitrinite
	fusinite
SN	Added to Thesaurus in 1995.

Semino

Seminoe Mountains
BT	United States
	.Wyoming
	..Carbon County Wyoming
	...Seminoe Mountains
RT	Rocky Mountains
SN	Central Wyoming. Added to Thesaurus in 1985.

Seminole County Florida
BT	United States
	.Florida
	..Seminole County Florida
SN	E central Florida.

Seminole County Georgia
BT	United States
	.Georgia
	..Seminole County Georgia
SN	Extreme SW Georgia.

Seminole County Oklahoma
BT	United States
	.Oklahoma
	..Seminole County Oklahoma
SN	Central Oklahoma.

Seminole Formation
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Carboniferous
	....Pennsylvanian
	.....Upper Pennsylvanian
	......Missourian
	.......Seminole Formation
RT	Oklahoma
SN	In Skiatook Group. Includes Lenapah Limestone, Nowata Shale, Memorial Shale. NE, central, and central S Oklahoma.

Semipalatinsk Kazakhstan
BT	Commonwealth of Independent States
	.Kazakhstan
	..Semipalatinsk Kazakhstan
NT	Akzhal Kazakhstan
	Chingis-Tau
SN	Oblast and city in NE Kazakhstan. This term has multiple hierarchies.

semitropical environment
USE	subtropical environment

semivariograms
BT	statistical analysis
	.variance analysis
	..semivariograms
UF	semi-variograms
RT	mathematical geology
	mathematical methods
	geostatistics
	covariance analysis
	variograms
SN	Added to Thesaurus in 1985.

Semmering
BT	Europe
	.Central Europe
	..Austria
	...Semmering
RT	Lower Austria
	Styria Austria
SN	Resort area in Eastern Alps.

Semri Series
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Cambrian
	....Semri Series
RT	India
	Bihar India
	Uttar Pradesh India
	Madhya Pradesh India
	Vindhyan
	Kaimur Sandstone

semseyite
BT	sulfosalts
	.sulfantimonites
	..semseyite

senarmontite
BT	oxides
	.senarmontite

Sendai Japan
BT	nshu
	.Miyagi Japan
	..Sendai Japan
SN	City near E coast in Miyagi Prefecture, N Honshu.

Seneca County New York
BT	United States
	.New York
	..Seneca County New York
RT	Cayuga Lake
	Seneca Lake
SN	W central New York.

Seneca County Ohio
BT	United States
	.Ohio
	..Seneca County Ohio
RT	Sandusky River basin
SN	N Ohio.

Seneca Lake
BT	United States
	.New York
	..Finger Lakes
	...Seneca Lake
RT	Seneca County New York
	Yates County New York
SN	One of the Finger Lakes in Seneca and Yates counties. Also search Seneca. Indexed with counties as applicable.

Senegal
BT	Africa
	.West Africa
	..Senegal
NT	Dakar Senegal
RT	Sahel
	Senegal Basin
	Senegal River
	Mauritanides
SN	Formerly a republic in French Community. Achieved independence in 1960.

Senegal Basin
BT	Africa
	.West Africa
	..Senegal Basin
UF	Senegal River basin
RT	Mauritania
	Mali
	Senegal
	Guinea
SN	River basin. Indexed with countries as applicable.

Senegal River
BT	Africa
	.Senegal River
RT	Mauritania
	Mali
	Senegal
	Guinea
SN	Rises in the highlands of Guinea and flows N and then NW into the Atlantic Ocean at Saint-Louis in Senegal. Indexed with countries as applicable.

Senegal River basin
USE	Senegal Basin

Senonian
BT	Chronostratigraphic Units
	.Phanerozoic
	..Mesozoic
	...Cretaceous
	....Upper Cretaceous
	.....Senonian
NT	Campanian
	Coniacian
	Futaba Group
	Izumi Group
	Maestrichtian
	Santonian
SN	Europe. Above Turonian, below Danian.

sensing, remote
USE	remote sensing

sensitive clays
RT	clay
	clays
SN	Added to Thesaurus in 1981.

sensitive high mass-resolution ion microprobe data
USE	SHRIMP data

sensitivity analysis
RT	baseline studies
	mathematical methods
	mathematical models
	numerical analysis
	quality control
	reactivity
SN	Added to Thesaurus in 1989.

sensors
SN	Not a valid term for GeoRef. See geophysical methods, chemical analysis, transducers or instruments for specific description of methods.

Sentinel Butte Formation
BT	Chronostratigraphic Units
	.Phanerozoic
	..Cenozoic
	...Paleogene
	....Paleocene
	.....Sentinel Butte Formation
RT	Montana
	North Dakota
	Fort Union Formation
SN	In Fort Union Formation. Overlies Tongue River Member. NE Montana, and SW North Dakota.

separation
RT	mixing
	processes

sepiolite
BT	silicates
	.sheet silicates
	..clay minerals
	...sepiolite
UF	meerschaum

Sept-Iles Quebec
BT	Canada
	.Eastern Canada
	..Quebec
	...Saguenay County Quebec
	....Sept-Iles Quebec
UF	Seven Isles Quebec
SN	City on the Saint Lawrence River in SE Quebec.

septa
UF	septae
RT	morphology
	fossils

septae
USE	septa

septaria
BT	sedimentary structures
	.secondary structures
	..septaria
RT	concretions
	cone-in-cone

Septibranchia
BT	Invertebrata
	.Mollusca
	..Bivalvia
	...Septibranchia

Sequanian
BT	Chronostratigraphic Units
	.Phanerozoic
	..Mesozoic
	...Jurassic
	....Upper Jurassic
	.....Sequanian
SN	Europe.

Sequatchie County Tennessee
BT	United States
	.Tennessee
	..Sequatchie County Tennessee

Sequatchie River valley
USE	Sequatchie Valley

Sequatchie Valley
BT	United States
	.Tennessee
	..Sequatchie Valley
UF	Sequatchie River valley
SN	River valley in SE central Tennessee. Indexed with counties as applicable.

sequence stratigraphy
UF	sequences, stratigraphic
RT	stratigraphy
	paleogeography
	unconformities
	Fischer plots
	cyclostratigraphy
	lowstands
	lithostratigraphy
	highstands
	seismic stratigraphy
	parasequences
	retrogradation
SN	Added to Thesaurus in 1993.

sequences, stratigraphic
USE	sequence stratigraphy

Sequoia
BT	Plantae
	.Spermatophyta
	..Gymnospermae
	...Coniferales
	....Taxodiaceae
	.....Sequoia
SN	Genus.

Sequoyah County Oklahoma
BT	United States
	.Oklahoma
	..Sequoyah County Oklahoma

Serajevo Bosnia-Herzegovina
USE	Sarajevo Bosnia-Herzegovina

Serbia
BT	Europe
	.Southern Europe
	..Yugoslavia
	...Serbia
NT	Aleksinac Yugoslavia
	Belgrade Yugoslavia
	Bor Yugoslavia
	Kopaonik
	Kosovo-Metohija Yugoslavia
	Kostolac
	Majdanpek Yugoslavia
	Soko Banja Yugoslavia
	Timok Basin
	Vojvodina Yugoslavia
	Western Morava River
	Zlatibor Mountains
UF	Servia
RT	Mediterranean region
	Balkan Peninsula
	Banat
	Danube River
	Danube Valley
	Morava River valley
	Pannonia
	Pannonian Basin
	Balkan Mountains
	Krajiste
	Macedonia
	Moesia
	Osogovo Mountains
	Serbo-Macedonian Massif
	Tisza River
SN	Since 1991, associated with Montenegro in modern Federal Republic of Yugoslavia. Before 1995, used as republic of E and NE former Yugoslavia. Formerly Servia.

Serbo-Macedonian Massif
BT	Europe
	.Southern Europe
	..Serbo-Macedonian Massif
RT	Yugoslavia
	Serbia
	Greece
	Yugoslav Macedonia
	Macedonia
	Greek Macedonia
SN	Macedonia and S Serbia. Indexed with republics or regions as applicable.

Serebryanka Formation
BT	Chronostratigraphic Units
	.Phanerozoic
	..Mesozoic
	...Triassic
	....Lower Triassic
	.....Serebryanka Formation
RT	Middle Triassic
	Russian Federation
	Ukraine
SN	Lower and Middle Triassic (?). SE and E Ukraine and adjoining area in Russian Federation.

Sereth River
USE	Siret River

Sergipe Basin
USE	Sergipe-Alagoas Basin

Sergipe Brazil
BT	South America
	.Brazil
	..Sergipe Brazil
NT	Aracaju Brazil
	Propria Geosyncline
RT	Sao Francisco Basin
	Sergipe-Alagoas Basin
SN	State in NE Brazil.

Sergipe-Alagoas Basin
BT	South America
	.Brazil
	..Sergipe-Alagoas Basin
UF	Sergipe Basin
RT	Alagoas Brazil
	Sergipe Brazil
SN	In NE Brazil. Indexed with states as applicable.

sericit

sericite
BT	silicates
	.sheet silicates
	..mica group
	...sericite
RT	muscovite

sericitization
BT	metasomatism
	.sericitization
RT	hydrothermal alteration

Series 1
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Cambrian
	....Series 1
NT	Stage 1
	Stage 2

Series 2
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Cambrian
	....Series 2
NT	Stage 3
	Stage 4

Series 3
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Cambrian
	....Series 3
NT	Stage 5
	Stage 7
	Drumian

Serov Russian Federation
BT	Commonwealth of Independent States
	.Russian Federation
	..Sverdlovsk Russian Federation
	...Serov Russian Federation
BT	Asia
	.Serov Russian Federation
SN	City in Sverdlovsk Oblast E of Urals. Before 1993, Serov Russian Republic was also used. This term has multiple hierarchies.

Serozem
USE	Sierozems

Serpentes
BT	Chordata
	.Vertebrata
	..Tetrapoda
	...Reptilia
	....Diapsida
	.....Lepidosauria
	......Squamata
	.......Serpentes
NT	Colubridae
UF	Ophidia
SN	Suborder. Snakes.

serpentine
BT	silicates
	.sheet silicates
	..serpentine group
	...serpentine
RT	cerolite

serpentine group
BT	silicates
	.sheet silicates
	..serpentine group
NT	antigorite
	chrysotile
	garnierite
	lizardite
	serpentine
SN	Before 1993, cerolite was considered a narrower term.

serpentine rock
USE	serpentinite

serpentinite
BT	metamorphic rocks
	.metasomatic rocks
	..serpentinite
BT	metamorphic rocks
	.metaigneous rocks
	..serpentinite
UF	serpentine rock
RT	serpentinization
SN	Compositional term. This term has multiple hierarchies.

serpentinization
BT	metasomatism
	.serpentinization
RT	processes
	alteration
	hydrothermal alteration
	serpentinite

Serpukhovian
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Carboniferous
	....Mississippian
	.....Serpukhovian
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Carboniferous
	....Mississippian
	.....Upper Mississippian
	......Serpukhovian
SN	Added to Thesaurus in 1989.

Serpulidae
BT	Invertebrata
	.Vermes
	..Polychaetia
	...Serpulidae
SN	Family.

Serra do Espinhaco
BT	South America
	.Brazil
	..Serra do Espinhaco
RT	Minas Gerais Brazil
	Bahia Brazil
SN	Mountain range, E central Brazil. Added to Thesaurus in 1985.

Serra do Mar
BT	South America
	.Brazil
	..Serra do Mar
RT	Parana Brazil
	Sao Paulo Brazil
	Santa Catarina Brazil
SN	Coastal mountain range in S and SE Brazil. Indexed with states as applicable.

Serra do Navio Brazil
BT	South America
	.Brazil
	..Amapa Brazil
	...Serra do Navio Brazil
SN	Town in central Amapa, N Brazil.

Serra Geral Formation
BT	Chronostratigraphic Units
	.Phanerozoic
	..Mesozoic
	...Serra Geral Formation
RT	Jurassic
	Cretaceous
	Brazil
	Sao Paulo Brazil
	Paraguay

Serrania de Cuenca
BT	Europe
	.Southern Europe
	..Iberian Peninsula
	...Spain
	....Serrania de Cuenca
RT	Guadalajara Spain
	Cuenca Spain
	Iberian Mountains
SN	Mountain range in E central Spain. Indexed with provinces as applicable.

Serrania de Ronda
BT	Europe
	.Southern Europe
	..Iberian Peninsula
	...Spain
	....Andalusia Spain
	.....Serrania de Ronda
BT	Europe
	.Southern Europe
	..Iberian Peninsula
	...Spain
	....Betic Cordillera
	.....Serrania de Ronda
UF	Ronda Massif
	Ronda Sierra
	Ronda, Serrania de
	Sierra de Ronda
RT	Cadiz Spain
	Malaga Spain
SN	Spur of the Cordillera Penibetica in Andalusia. This term has multiple hierarchies. Indexed with provinces as applicable.

Serravallian
BT	Chronostratigraphic Units
	.Phanerozoic
	..Cenozoic
	...Neogene
	....Miocene
	.....Serravallian
BT	Chronostratigraphic Units
	.Phanerozoic
	..Cenozoic
	...Neogene
	....Miocene
	.....middle Miocene
	......Serravallian
SN	Europe.

Servia
USE	Serbia

Sesia Valley
BT	Europe
	.Southern Europe
	..Italy
	...Sesia Valley
RT	Piemonte Italy
SN	River valley E of Lago Maggiore in N Italy.

Sesia Zone
BT	Europe
	.Southern Europe
	..Italy
	...Piemonte Italy
	....Sesia Zone
RT	Sesia-Lanzo Zone
SN	N Piemonte.

Sesia-Lanzo Zone
BT	Europe
	.Southern Europe
	..Italy
	...Sesia-Lanzo Zone
RT	Piemonte Italy
	Lombardy Italy
	Alps
	Sesia Zone
SN	N Piemonte and N Lombardy. Indexed with autonomous regions as applicable.

Sespe Formation
BT	Chronostratigraphic Units
	.Phanerozoic
	..Cenozoic
	...Paleogene
	....Sespe Formation
RT	Oligocene
	California
	upper Eocene
SN	Upper Eocene and Oligocene. Overlying Coldwater Sandstone Member of Tejon Formation and underlying Vaqueros Formation. In S California. Indexed with ages as applicable.

Sete France
BT	rault France
	.Sete France
UF	Cete France
SN	City on Gulf of Lion in S Herault, S France. Before 1978, also search Cette.

Seto Inland Sea
USE	Inland Sea

Seto Sea
USE	Inland Sea

Seto-chi-umi
USE	Inland Sea

Seto-Naikai
USE	Inland Sea

Setouchi
USE	Inland Sea

Sette Daban (Range)
USE	Sette-Daban Range

Sette-Daban Range
BT	Commonwealth of Independent States
	.Russian Federation
	..Sette-Daban Range
BT	Asia
	.Sette-Daban Range
UF	Sette Daban (Range)
RT	Yakutia Russian Federation
	Khabarovsk Russian Federation
SN	NW Khabarovsk Kray and SE Yakutia. Also search Sette-Daban. This term has multiple hierarchies.

Setting Lake
BT	Canada
	.Western Canada
	..Manitoba
	...Setting Lake
SN	Central Manitoba.

settlement
RT	compactness
	foundations
	land subsidence
	raft foundations
	engineering geology
	settling
	soil mechanics

settling
RT	deposition
	hydrology
	laboratory studies
	rates
	sediment transport
	sedimentation rates
	settlement
	sedimentation
	siltation
	suspended materials
	suspension
	transport
	velocity
SN	For engineering studies, use settlement.

Setubal Portugal
BT	Europe
	.Southern Europe
	..Iberian Peninsula
	...Portugal
	....Setubal Portugal
RT	Iberian pyrite belt
	Estremadura Portugal
SN	District in SW Portugal.

Sevan Armenia
BT	Europe
	.Armenia
	..Sevan Armenia
RT	Lake Sevan
SN	Town on shore of Lake Sevan in N Armenia. This term has multiple hierarchies.

Seven Devils Mountains
BT	United States
	.Idaho
	..Seven Devils Mountains
RT	Adams County Idaho
	Idaho County Idaho
SN	Range in Adams and Idaho counties in W Idaho. Indexed with counties as applicable.

Seven Isles Quebec
USE	Sept-Iles Quebec

Seven Rivers Formation
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Permian
	....Guadalupian
	.....Seven Rivers Formation
RT	New Mexico
	Texas
SN	SE New Mexico and W Texas. Added to Thesaurus in 1985.

Severin
BT	Europe
	.Southern Europe
	..Banat
	...Severin
BT	Europe
	.Southern Europe
	..Romania
	...Severin
SN	Former province whose capital was Caransebes. Much of the province is now Caras-Severin County. This term has multiple hierarchies.

Severn Estuary
RT	England
	Maryland
	Virginia
	Wales
SN	England or Wales. Also near Chesapeake Bay of Maryland and Virginia. Indexed with counties or regions as applicable. Added to Thesaurus in 1989.

Severn Formation
RT	Delaware
	Eocene
	K-T boundary
	Maryland
	United States
	Upper Cretaceous
SN	Named for exposures in cliffs at Round Bay on the Severn River. E Maryland and Delaware. Indexed with ages as applicable. Added to Thesaurus in 1989.

Severn Valley
RT	England
	Great Britain
	Wales
SN	River valley. Occurs in several locations. Also search Severn River. Search in combination with state or region. Indexed with regions as applicable.

Severnaya Zemlya
BT	Asia
	.West Siberia
	..Severnaya Zemlya
BT	Commonwealth of Independent States
	.Russian Federation
	..Severnaya Zemlya
SN	This term has multiple hierarchies. Added to Thesaurus in 1981.

Sevier County Arkansas
BT	United States
	.Arkansas
	..Sevier County Arkansas
SN	SW Arkansas.

Sevier County Tennessee
BT	United States
	.Tennessee
	..Sevier County Tennessee
SN	E Tennessee.

Sevier County Utah
BT	United States
	.Utah
	..Sevier County Utah
SN	Central Utah.

Sevier Desert
BT	United States
	.Utah
	..Sevier Desert
RT	Basin and Range Province
	Millard County Utah
	Juab County Utah
SN	W central Utah. Indexed with counties as applicable. Added to Thesaurus in 1985.

Sevier orogenic belt
BT	United States
	.Sevier orogenic belt
UF	Sevier Orogeny
	Sevier Plateau
RT	Idaho
	Utah
	Wyoming
SN	Central and W Utah, S Idaho and SW Wyoming. Also search Sevier AND belt; Sevier AND orogeny.

Sevier Orogeny
USE	Sevier orogenic belt

Sevier Plateau
USE	Sevier orogenic belt

Sevilla
USE	Seville City Spain

Seville City Spain
BT	Europe
	.Southern Europe
	..Iberian Peninsula
	...Spain
	....Andalusia Spain
	.....Seville Spain
	......Seville City Spain
UF	Sevilla
SN	Refers to only the city in SW Spain. Before 1993, also search Seville Spain.

Seville Spain
BT	Europe
	.Southern Europe
	..Iberian Peninsula
	...Spain
	....Andalusia Spain
	.....Seville Spain
NT	Carmona Spain
	Seville City Spain
SN	Refers only to the province in SW Spain. From 1981-1992, also search Seville Province and Spain. For the city, see Seville City Spain.

sewage
RT	pollutants
	pollution
	sewage sludge
	waste disposal

sewage sludge
RT	pollutants
	pollution
	sewage
	sludge
	soil treatment
	solid waste
	water quality
	waste disposal
SN	Before 1993, also search sewage and sludge. Added to Thesaurus in 1993.

Seward County Kansas
BT	United States
	.Kansas
	..Seward County Kansas
SN	SW Kansas.

Seward County Nebraska
BT	United States
	.Nebraska
	..Seward County Nebraska
RT	Big Blue River
SN	SE Nebraska.

Seward Peninsula
BT	United States
	.Alaska
	..West-Central Alaska
	...Seward Peninsula
RT	Nome Alaska
SN	On Bering Strait between Kotzebue and Norton sounds in W Alaska. Also search Seward AND Alaska.

sexual dimorphism
RT	reproduction

Seychelles
BT	Indian Ocean Islands
	.Seychelles
NT	Aldabra Island
	Mahe Island
RT	Indian Ocean
SN	Officially designated as the Republic of Seychelles. Island group about 700 miles NE of Madagascar.

Seymour Island
UF	Marambio Island
	Vicecomodoro Marambio Island
RT	Antarctica
	East Pacific Ocean Islands
	Weddell Sea
	Galapagos Islands
	Lopez de Bertodano Formation
	Sobral Formation
	La Meseta Formation
SN	Island in the Weddell Sea, off the Antarctic Peninsula. Also one of the Galapagos Islands. Search in combination with Antarctica or Galapagos Islands. Indexed with Antarctica or Galapagos Islands as applicable. Added to Thesaurus in 1985.