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Mid-
Mid-Antarctic Ridge
BT
Antarctic Ocean
.
Mid-Antarctic Ridge
SN
Added to Thesaurus in 1981.
Mid-Arctic Ocean Ridge
BT
Arctic Ocean
.
Mid-Arctic Ocean Ridge
UF
Gakkel Ridge
Nansen-Gakkel Ridge
RT
mid-ocean ridges
Eurasia Basin
SN
Added to Thesaurus in 1981.
Mid-Atlantic Ridge
BT
Atlantic Ocean
.
Mid-Atlantic Ridge
NT
Snakepit hydrothermal field
TAG hydrothermal field
RT
Atlantis fracture zone
DSDP Site 10
DSDP Site 11
DSDP Site 14
DSDP Site 15
DSDP Site 16
DSDP Site 17
DSDP Site 18
DSDP Site 332
DSDP Site 333
DSDP Site 334
DSDP Site 335
DSDP Site 353
DSDP Site 395
DSDP Site 396
DSDP Site 407
DSDP Site 408
DSDP Site 410
D
SN
Extends parallel to the continental margins in mid ocean in both the North and South Atlantic oceans. Rises 6000 ft. above the ocean floor and surfaces as the Azores, Ascension Island, Saint Helena, and Tristan da Cunha islands.
Mid-Cayman Rise
BT
Atlantic Ocean
.
North Atlantic
..
Caribbean Sea
...
Mid-Cayman Rise
SN
NW Caribbean Sea, S of Cuba. Added to Thesaurus in 1981.
Mid-Continent
USE
Midcontinent
Mid-continent Rift
USE
Keweenawan Rift
mid-crustal
SN
Not a valid term for GeoRef. See middle crust.
Mid-Indian Ocean Ridge
USE
Mid-Indian Ridge
Mid-Indian Ridge
BT
Indian Ocean
.
Mid-Indian Ridge
NT
Central Indian Ridge
Southeast Indian Ridge
UF
Indian Ocean Ridge
Indian Ridge
Mid-Indian Ocean Ridge
RT
Antarctic Ocean
mid-ocean ridges
DSDP Site 251
SN
Extends from S of the Maldives, S and SE into Antarctic waters.
mid-ocean ridge basalts
BT
igneous rocks
.
volcanic rocks
..
basalts
...
mid-ocean ridge basalts
UF
MORB
RT
sea-floor spreading
mid-ocean ridges
spreading centers
mid-ocean ridges
UF
mid-oceanic ridges
midoceanic ridges
ocean ridges
RT
bottom features
Australian-Antarctic discordance
aseismic ridges
Mid-Atlantic Ridge
Juan de Fuca Ridge
black smokers
Carlsberg Ridge
Central Indian Ridge
Chile Ridge
Galapagos Rift
East Pacific Rise
Mid-Arctic Ocean Ridge
fracture zones
median valley
Mid-
mid-oceanic ridges
USE
mid-ocean ridges
Mid-Pacific Mountains
BT
Pacific Ocean
.
North Pacific
..
Mid-Pacific Mountains
NT
Resolution Seamount
RT
DSDP Site 313
DSDP Site 463
Leg 62
Leg 143
ODP Site 865
ODP Site 866
ODP Site 867
ODP Site 868
SN
NW central Pacific, N of the Marshall Islands. Added to Thesaurus in 1995.
Mid-Pacific Rise
SN
After 1994, not a valid term for GeoRef. See Mid-Pacific Mountains if applicable.
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