About: Seafloor depth versus age

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The depth of the seafloor on the flanks of a mid-ocean ridge is determined mainly by the age of the oceanic lithosphere; older seafloor is deeper. During seafloor spreading, lithosphere and mantle cooling, contraction, and isostatic adjustment with age cause seafloor deepening. This relationship has come to be better understood since around 1969 with significant updates in 1974 and 1977. Two main theories have been put forward to explain this observation: one where the mantle including the lithosphere is cooling; the cooling mantle model, and a second where a lithosphere plate cools above a mantle at a constant temperature; the cooling plate model. The cooling mantle model explains the age-depth observations for seafloor younger than 80 million years. The cooling plate model explains the a

Attributes	Values
rdfs:label	Seafloor depth versus age (en)
rdfs:comment	The depth of the seafloor on the flanks of a mid-ocean ridge is determined mainly by the age of the oceanic lithosphere; older seafloor is deeper. During seafloor spreading, lithosphere and mantle cooling, contraction, and isostatic adjustment with age cause seafloor deepening. This relationship has come to be better understood since around 1969 with significant updates in 1974 and 1977. Two main theories have been put forward to explain this observation: one where the mantle including the lithosphere is cooling; the cooling mantle model, and a second where a lithosphere plate cools above a mantle at a constant temperature; the cooling plate model. The cooling mantle model explains the age-depth observations for seafloor younger than 80 million years. The cooling plate model explains the a (en)
dcterms:subject	Oceanic ridges Geological processes Volcanic landforms Physical oceanography Coastal and oceanic landforms Oceanographical terminology Plate tectonics Basalt
Wikipage page ID	62423927 (xsd:integer)
Wikipage revision ID	1024604642 (xsd:integer)
Link from a Wikipage to another Wikipage	Eustatic Earth's mantle Continental drift Continental shelf Ocean Drilling Program Sea-level curve Convection Thermal diffusivity Oceanic lithosphere Magnetic anomaly Oceanic ridges Plate tectonics Seafloor spreading Steady state Heat transfer Geological processes Error function Volcanic landforms Isostasy Thermal expansion Heat equation Heaviside step function Subduction Asthenosphere Physical oceanography Coastal and oceanic landforms Oceanographical terminology Plate tectonics Basalt Sea level Mid-ocean ridge Sea level equation Sea level rise Upper mantle (Earth) Oceanic crust Vine–Matthews–Morley hypothesis
sameAs	Seafloor depth versus age Seafloor depth versus age
dbp:wikiPageUsesTemplate	dbt:Cite_journal dbt:Collapse_bottom dbt:Collapse_top
has abstract	The depth of the seafloor on the flanks of a mid-ocean ridge is determined mainly by the age of the oceanic lithosphere; older seafloor is deeper. During seafloor spreading, lithosphere and mantle cooling, contraction, and isostatic adjustment with age cause seafloor deepening. This relationship has come to be better understood since around 1969 with significant updates in 1974 and 1977. Two main theories have been put forward to explain this observation: one where the mantle including the lithosphere is cooling; the cooling mantle model, and a second where a lithosphere plate cools above a mantle at a constant temperature; the cooling plate model. The cooling mantle model explains the age-depth observations for seafloor younger than 80 million years. The cooling plate model explains the age-depth observations best for seafloor older that 20 million years. In addition, the cooling plate model explains the almost constant depth and heat flow observed in very old seafloor and lithosphere. In practice it is convenient to use the solution for the cooling mantle model for an age-depth relationship younger than 20 million years. Older than this the cooling plate model fits data as well. Beyond 80 million years the plate model fits better than the mantle model. (en)
prov:wasDerivedFrom	wikipedia-en:Seafloor_depth_versus_age?oldid=1024604642&ns=0
page length (characters) of wiki page	17366 (xsd:nonNegativeInteger)
foaf:isPrimaryTopicOf	wikipedia-en:Seafloor_depth_versus_age
is rdfs:seeAlso of	Seafloor spreading
is Link from a Wikipage to another Wikipage of	Oceanic basin Sedimentary basin Marine geophysics Marine sediment Mid-ocean ridge Oceanic crust
is foaf:primaryTopic of	wikipedia-en:Seafloor_depth_versus_age

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