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- Marine_regression abstract "Marine regression is a geological process occurring when areas of submerged seafloor are exposed above the sea level. The opposite event, marine transgression, occurs when flooding from the sea covers previously exposed land.Evidence of marine regressions and transgressions occurs throughout the fossil record, and these fluctuations are thought to have caused or contributed to several mass extinctions, among them the Permian-Triassic extinction event (250 million years ago) and Cretaceous–Paleogene extinction event (66 Ma). At the time of the Permian-Triassic extinction, the largest extinction event in the Earth's history, global sea level fell 250 metres (820 ft).A major regression could, in and of itself, cause marine organisms in shallow seas to go extinct; yet mass extinctions tend to involve both terrestrial and aquatic species, and it is harder to see how a marine regression could cause widespread extinctions of land animals. Regressions are therefore seen as correlates or symptoms of major extinctions, rather than primary causes. The Permian regression might have been related to the formation of Pangaea: the accumulation of all the major landmasses into one body could have facilitated a regression, by providing \"a slight enlargement of the ocean basins as the great continents coalesced.\" Yet this cause could not have applied in all, or even many, other cases.During the ice ages of the Pleistocene, a clear correlation existed between marine regressions and episodes of glaciation; as the balance shifts between the global cryosphere and hydrosphere, more of the planet's water in ice sheets means less in the oceans. At the height of the last ice age, at around 18,000 years before the present, the global sea level was 120 to 130 metres (390-425 ft.) lower than today. A cold spell around 6 million years ago was linked to an advance in glaciation, a marine regression, and the start of the Messinian salinity crisis in the Mediterranean basin. Some major regressions of the past, however, seem unrelated to glaciation episodes — the regression that accompanied the mass extinction at the end of the Cretaceous Period being one example.A clear and certain understanding of major marine regressions has not yet been achieved; according to one hypothesis, regressions may be linked to a \"slowdown in sea-floor spreading, leading to a generalized drop in sea level (as the mid-ocean ridges would take up less space)....\" In this view, major marine regressions are one aspect of a normal variation in rates of plate tectonic activity, which lead to major episodes of global volcanism like the Siberian Traps and the Deccan Traps, which in turn cause large extinction events.".
- Marine_regression wikiPageExternalLink marine-transgression-marine-regression.
- Marine_regression wikiPageID "12330489".
- Marine_regression wikiPageLength "3954".
- Marine_regression wikiPageOutDegree "29".
- Marine_regression wikiPageRevisionID "685543759".
- Marine_regression wikiPageWikiLink 8.2_kiloyear_event.
- Marine_regression wikiPageWikiLink Category:Coastal_geography.
- Marine_regression wikiPageWikiLink Category:Extinction_events.
- Marine_regression wikiPageWikiLink Category:Oceanographical_terminology.
- Marine_regression wikiPageWikiLink Category:Plate_tectonics.
- Marine_regression wikiPageWikiLink Category:Sedimentology.
- Marine_regression wikiPageWikiLink Cretaceous.
- Marine_regression wikiPageWikiLink Cretaceous–Paleogene_extinction_event.
- Marine_regression wikiPageWikiLink Cryosphere.
- Marine_regression wikiPageWikiLink Deccan_Traps.
- Marine_regression wikiPageWikiLink Extinction_event.
- Marine_regression wikiPageWikiLink Geology.
- Marine_regression wikiPageWikiLink Glacial_period.
- Marine_regression wikiPageWikiLink Holocene_glacial_retreat.
- Marine_regression wikiPageWikiLink Hydrosphere.
- Marine_regression wikiPageWikiLink Ice_age.
- Marine_regression wikiPageWikiLink Marine_terrace.
- Marine_regression wikiPageWikiLink Marine_transgression.
- Marine_regression wikiPageWikiLink Mediterranean_Sea.
- Marine_regression wikiPageWikiLink Messinian_salinity_crisis.
- Marine_regression wikiPageWikiLink Pangaea.
- Marine_regression wikiPageWikiLink Permian–Triassic_extinction_event.
- Marine_regression wikiPageWikiLink Plate_tectonics.
- Marine_regression wikiPageWikiLink Pleistocene.
- Marine_regression wikiPageWikiLink Siberian_Traps.
- Marine_regression wikiPageWikiLink Volcano.
- Marine_regression wikiPageWikiLink Year.
- Marine_regression wikiPageWikiLinkText "Marine regression".
- Marine_regression wikiPageWikiLinkText "Regression".
- Marine_regression wikiPageWikiLinkText "marine regression".
- Marine_regression wikiPageWikiLinkText "receded".
- Marine_regression wikiPageWikiLinkText "regression".
- Marine_regression wikiPageWikiLinkText "regressions".
- Marine_regression wikiPageWikiLinkText "regressive".
- Marine_regression wikiPageWikiLinkText "sea-level minimum".
- Marine_regression wikiPageUsesTemplate Template:Coastal_geography.
- Marine_regression wikiPageUsesTemplate Template:Geologic_Principles.
- Marine_regression wikiPageUsesTemplate Template:Reflist.
- Marine_regression subject Category:Coastal_geography.
- Marine_regression subject Category:Extinction_events.
- Marine_regression subject Category:Oceanographical_terminology.
- Marine_regression subject Category:Plate_tectonics.
- Marine_regression subject Category:Sedimentology.
- Marine_regression hypernym Process.
- Marine_regression type Election.
- Marine_regression type Event.
- Marine_regression type Event.
- Marine_regression type Redirect.
- Marine_regression type Subfield.
- Marine_regression comment "Marine regression is a geological process occurring when areas of submerged seafloor are exposed above the sea level.".
- Marine_regression label "Marine regression".
- Marine_regression sameAs Q577185.
- Marine_regression sameAs Regressió_marina.
- Marine_regression sameAs Regression_(Geologie).
- Marine_regression sameAs Regressioon_(geoloogia).
- Marine_regression sameAs Régression_marine.
- Marine_regression sameAs Ռեգրեսիա.
- Marine_regression sameAs Regressione_marina.
- Marine_regression sameAs რეგრესია_(გეოლოგია).
- Marine_regression sameAs Регрессия.
- Marine_regression sameAs Regressie_(geologie).
- Marine_regression sameAs Regresjon_i_geologi.
- Marine_regression sameAs Regresja_morza.
- Marine_regression sameAs Regressão_marinha.
- Marine_regression sameAs m.02v_jqq.
- Marine_regression sameAs Регрессия_моря.
- Marine_regression sameAs Регресија_(геологија).
- Marine_regression sameAs Kıyı_gerilemesi.
- Marine_regression sameAs Регресія_(геологія).
- Marine_regression sameAs Regressiya.
- Marine_regression sameAs Biển_lùi.
- Marine_regression sameAs Q577185.
- Marine_regression wasDerivedFrom Marine_regression?oldid=685543759.
- Marine_regression isPrimaryTopicOf Marine_regression.