global mid-ocean ridge system
E299659
The global mid-ocean ridge system is a continuous, tectonically active underwater mountain chain encircling the Earth where new oceanic crust is formed by seafloor spreading.
All labels observed (1)
| Label | Occurrences |
|---|---|
| global mid-ocean ridge system canonical | 3 |
Statements (51)
| Predicate | Object |
|---|---|
| instanceOf |
geological feature
ⓘ
mid-ocean ridge ⓘ tectonic plate boundary system ⓘ underwater mountain range ⓘ |
| controls | age distribution of oceanic crust ⓘ |
| encircles | Earth ⓘ |
| extendsThrough |
Atlantic Ocean
ⓘ
Indian Ocean ⓘ Pacific Ocean ⓘ Southern Ocean ⓘ |
| formsBoundaryBetween | divergent tectonic plates ⓘ |
| hasAlternativeLengthEstimate | about 60000 km ⓘ |
| hasCrustalComposition | mafic oceanic crust ⓘ |
| hasFastSpreadingExample | East Pacific Rise ⓘ |
| hasSlowSpreadingExample | Mid-Atlantic Ridge ⓘ |
| hasSpreadingRateRange | about 1 cm/yr to more than 15 cm/yr ⓘ |
| hasTopographicExpression | elevated ridge above abyssal plains ⓘ |
| hasTotalLength | about 65000 km ⓘ |
| hasTypicalCrustalThickness | about 6–7 km ⓘ |
| hosts |
black smoker chimneys
ⓘ
chemosynthetic biological communities ⓘ hydrothermal vent systems ⓘ |
| includes |
Carlsberg Ridge
ⓘ
Central Indian Ridge ⓘ Chile Rise ⓘ East Pacific Rise ⓘ Gakkel Ridge ⓘ Juan de Fuca Ridge ⓘ Kolbeinsey Ridge ⓘ Mid-Atlantic Ridge ⓘ Mohns Ridge ⓘ Kolbeinsey Ridge ⓘ
surface form:
Reykjanes Ridge
Southeast Indian Ridge ⓘ Southwest Indian Ridge ⓘ |
| influences |
global heat flow
ⓘ
ocean basin topography ⓘ |
| isAssociatedWith |
mantle upwelling
ⓘ
partial melting of upper mantle ⓘ |
| isCharacterizedBy |
axial high at fast-spreading segments
ⓘ
central rift valley at slow-spreading segments ⓘ |
| isPartOf | global plate tectonic system ⓘ |
| isSegmentedBy |
fracture zones
ⓘ
transform faults ⓘ |
| isSiteOf |
formation of new oceanic crust
ⓘ
seafloor spreading ⓘ |
| locatedIn | world ocean ⓘ |
| produces |
basaltic magma
ⓘ
mid-ocean ridge basalt ⓘ |
| tectonicActivity | active ⓘ |
| wasKeyEvidenceFor |
seafloor spreading hypothesis
ⓘ
theory of plate tectonics ⓘ |
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.