Pacific-Antarctic Ridge
E57136
The Pacific-Antarctic Ridge is a major mid-ocean spreading center in the Southern Ocean where the Pacific and Antarctic tectonic plates diverge, creating new oceanic crust.
Observed surface forms (4)
| Surface form | Occurrences |
|---|---|
| Pacific–Antarctic Ridge | 2 |
| American-Antarctic Ridge | 1 |
| Pacific-Antarctic Ridge region | 1 |
| Pacific-Antarctic plate boundary zone | 1 |
Statements (41)
| Predicate | Object |
|---|---|
| instanceOf |
divergent plate boundary
ⓘ
mid-ocean ridge ⓘ spreading center ⓘ |
| associatedWith |
earthquake activity
ⓘ
hydrothermal activity ⓘ linear volcanic features along ridge axis ⓘ |
| bathymetry | shallower than surrounding abyssal plains ⓘ |
| connectedTo |
East Pacific Rise
ⓘ
Pacific-Antarctic Ridge self-linksurface differs ⓘ
surface form:
Pacific-Antarctic plate boundary zone
|
| creates | new oceanic crust ⓘ |
| crustAgeTrend | youngest crust at ridge axis ⓘ |
| crustFormation | continuous oceanic crust generation ⓘ |
| crustTypeProduced | basaltic oceanic crust ⓘ |
| discoveredBy | marine geophysical surveys ⓘ |
| environment | deep-sea environment ⓘ |
| geodynamicContext | spreading center in oceanic lithosphere ⓘ |
| geologicalAge | Cenozoic activity dominant ⓘ |
| geologicalProcess |
mantle upwelling
ⓘ
partial melting of upper mantle ⓘ |
| governedBy | plate tectonics ⓘ |
| heatFlow | elevated near ridge axis ⓘ |
| influences | seafloor topography of South Pacific ⓘ |
| locatedIn |
South Pacific Ocean
ⓘ
Southern Ocean ⓘ |
| oceanBasin |
Pacific Ocean
ⓘ
Southern Ocean ⓘ |
| partOf |
circum-Antarctic plate boundary system
ⓘ
global mid-ocean ridge system ⓘ |
| plateBoundaryBetween |
Pacific Plate
ⓘ
surface form:
Pacific Plate and Antarctic Plate
|
| relativeMotion | plates diverging ⓘ |
| roleInPlateTectonics | accommodates divergence of Pacific and Antarctic plates ⓘ |
| separates |
Antarctic Plate
ⓘ
Pacific Plate ⓘ |
| spreadingType | seafloor spreading ⓘ |
| studyMethods |
bathymetric mapping
ⓘ
magnetic anomaly mapping ⓘ seismic profiling ⓘ |
| symmetry | magnetic stripe anomalies on seafloor ⓘ |
| tectonicRegime | extensional ⓘ |
| tectonicSetting | oceanic-oceanic divergent boundary ⓘ |
| topographicExpression | submarine mountain chain ⓘ |
Referenced by (9)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Pacific-Antarctic plate boundary zone
this entity surface form:
Pacific–Antarctic Ridge
this entity surface form:
Pacific-Antarctic Ridge region
this entity surface form:
Pacific–Antarctic Ridge
this entity surface form:
American-Antarctic Ridge