stratigrap  search
stratigraphic  search
SNA valid term through 1977. After 1977, use stratigraphic maps.
stratigraphic boundary  search
NTK-T boundary
 Permian-Triassic boundary
UFboundaries, stratigraphic
RTallostratigraphy
 stratigraphy
 stratigraphic columns
 stratotypes
SNBefore 1993, also search boundary which was used for this concept from 1978-1992. Use in combination with appropriate age terms (list E). Added to Thesaurus in 1993.
stratigraphic columns  search
RTcross sections
 stratigraphic boundary
 stratigraphic units
 stratigraphy
 stratotypes
 type sections
SNAdded to Thesaurus in 1982.
stratigraphic controls  search
RTcontrols
 lithologic controls
 mineral deposits, genesis
 structural controls
SNAs of 1993, restricted to economic studies.
stratigraphic correlation  search
USEcorrelation
stratigraphic gaps  search
UFgaps, stratigraphic
 hiatus, stratigraphic
RTstratigraphy
 unconformities
 hardground
 lithostratigraphy
SNBefore 1998, also search hiatus or hiatuses. Added to Thesaurus in 1981.
stratigraphic geology  search
USEstratigraphy
stratigraphic maps  search
BTmaps
 .stratigraphic maps
RTstructural maps
SNBefore 1978, search maps AND stratigraphic.
stratigraphic range  search
USErange
stratigraphic traps  search
BTtraps
 .stratigraphic traps
UFlithologic traps
 porosity traps
RToil and gas fields
 petroleum
 petroleum exploration
 natural gas
 stratigraphic wedges
 petroleum accumulation
 structural traps
stratigraphic units  search
UFstrata
 units, stratigraphic
RTallostratigraphy
 stratigraphy
 biozones
 stratigraphic columns
 tectonostratigraphic units
 lithostratigraphy
stratigraphic wedges  search
UFpinch-outs
 pinchouts
RToil and gas fields
 stratigraphy
 petroleum
 petroleum exploration
 reservoir rocks
 natural gas
 lithofacies
 lithostratigraphy
 petroleum accumulation
 stratigraphic traps
SNUsed for beds that pinch out. Added to Thesaurus in 1981.
stratigraphy  search
UFstratigraphic geology
RTbiogeography
 biomarkers
 allostratigraphy
 aminostratigraphy
 biostratigraphy
 continental drift
 catalogs
 bibliography
 Continental Offshore Stratigraphic Test
 cross sections
 correlation
 biozones
 chemostratigraphy
 chronostratigraphy
 cyclostratigraphy
 diachroni
SNUsed for the discipline as a whole.
Stratigraphy (category)  search
SNStratigraphy, GeoRef category code 12, 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.).