Mid-  search
Mid-Antarctic Ridge  search
BTAntarctic Ocean
 .Mid-Antarctic Ridge
SNAdded to Thesaurus in 1981.
Mid-Arctic Ocean Ridge  search
BTArctic Ocean
 .Mid-Arctic Ocean Ridge
UFGakkel Ridge
 Nansen-Gakkel Ridge
RTmid-ocean ridges
 Eurasia Basin
SNAdded to Thesaurus in 1981.
Mid-Atlantic Ridge  search
BTAtlantic Ocean
 .Mid-Atlantic Ridge
NTSnakepit hydrothermal field
 TAG hydrothermal field
RTAtlantis 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
SNExtends 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  search
BTAtlantic Ocean
 .North Atlantic
 ..Caribbean Sea
 ...Mid-Cayman Rise
SNNW Caribbean Sea, S of Cuba. Added to Thesaurus in 1981.
Mid-Continent  search
USEMidcontinent
Mid-continent Rift  search
USEKeweenawan Rift
mid-crustal  search
SNNot a valid term for GeoRef. See middle crust.
Mid-Indian Ocean Ridge  search
USEMid-Indian Ridge
Mid-Indian Ridge  search
BTIndian Ocean
 .Mid-Indian Ridge
NTCentral Indian Ridge
 Southeast Indian Ridge
UFIndian Ocean Ridge
 Indian Ridge
 Mid-Indian Ocean Ridge
RTAntarctic Ocean
 mid-ocean ridges
 DSDP Site 251
SNExtends from S of the Maldives, S and SE into Antarctic waters.
mid-ocean ridge basalts  search
BTigneous rocks
 .volcanic rocks
 ..basalts
 ...mid-ocean ridge basalts
UFMORB
RTsea-floor spreading
 mid-ocean ridges
 spreading centers
mid-ocean ridges  search
UFmid-oceanic ridges
 midoceanic ridges
 ocean ridges
RTbottom 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  search
USEmid-ocean ridges
Mid-Pacific Mountains  search
BTPacific Ocean
 .North Pacific
 ..Mid-Pacific Mountains
NTResolution Seamount
RTDSDP Site 313
 DSDP Site 463
 Leg 62
 Leg 143
 ODP Site 865
 ODP Site 866
 ODP Site 867
 ODP Site 868
SNNW central Pacific, N of the Marshall Islands. Added to Thesaurus in 1995.
Mid-Pacific Rise  search
SNAfter 1994, not a valid term for GeoRef. See Mid-Pacific Mountains if applicable.