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- Global_Standard_Stratigraphic_Age abstract "In the stratigraphy sub-discipline of geology, a Global Standard Stratigraphic Age, abbreviated GSSA, is a chronological reference point and criterion in the geologic record used to define the boundaries (an internationally sanctioned benchmark point) between different geological periods, epochs or ages on the overall geologic time scale in a chronostratigraphically useful rock layer. A worldwide multidisciplinary effort has been ongoing since 1974 to define such important metrics. The points and strata need be widespread and contain an identifiable sequence of layers or other unambiguous marker (identifiable or quantifiable) attributes.GSSAs, and the generally more recent and preferred benchmark GSSPs are defined by the International Commission on Stratigraphy (ICS) under the auspices of their parent organization, the International Union of Geological Sciences (IUGS), and are used primarily for time dating of rock layers older than 630 million years ago, lacking a good fossil record. The ICS first attempts to meet the standards of the GSSPs (see below) and if those fail, usually have enough information to make a preliminary selection of several competing GSSA prospects or proposals.The geologic record becomes spotty prior to about 542 million years ago. This is because the Earth's crust in geological time scales is constantly being recycled by tectonic and weathering forces, and older rocks and especially readily accessible exposed strata that can act as a time calibration are rare.For more recent periods, a Global Boundary Stratotype Section and Point (GSSP), largely based on paleontology and improved methods of fossil dating, is used to define such boundaries. In contrast to GSSAs, GSSPs are based on important events and transitions within a particular stratigraphic section. In older sections, there is insufficient fossil record or well preserved sections to identify the key events necessary for a GSSP, so GSSAs are defined based on fixed dates and selected criteria.".
- Global_Standard_Stratigraphic_Age wikiPageExternalLink gssp.htm.
- Global_Standard_Stratigraphic_Age wikiPageExternalLink ics-chart-timescale.
- Global_Standard_Stratigraphic_Age wikiPageExternalLink displayAbstract?fromPage=online&aid=74669.
- Global_Standard_Stratigraphic_Age wikiPageExternalLink geotime.htm.
- Global_Standard_Stratigraphic_Age wikiPageExternalLink over.htm.
- Global_Standard_Stratigraphic_Age wikiPageID "1786604".
- Global_Standard_Stratigraphic_Age wikiPageLength "3932".
- Global_Standard_Stratigraphic_Age wikiPageOutDegree "28".
- Global_Standard_Stratigraphic_Age wikiPageRevisionID "683218511".
- Global_Standard_Stratigraphic_Age wikiPageWikiLink Age_(geology).
- Global_Standard_Stratigraphic_Age wikiPageWikiLink Category:Earth_sciences.
- Global_Standard_Stratigraphic_Age wikiPageWikiLink Category:Geochronology.
- Global_Standard_Stratigraphic_Age wikiPageWikiLink Category:Geologic_time_scales_of_Earth.
- Global_Standard_Stratigraphic_Age wikiPageWikiLink Category:Stratigraphy.
- Global_Standard_Stratigraphic_Age wikiPageWikiLink Category:Units_of_time.
- Global_Standard_Stratigraphic_Age wikiPageWikiLink Epoch_(geology).
- Global_Standard_Stratigraphic_Age wikiPageWikiLink European_Mammal_Neogene.
- Global_Standard_Stratigraphic_Age wikiPageWikiLink Fossil.
- Global_Standard_Stratigraphic_Age wikiPageWikiLink Fossil_record.
- Global_Standard_Stratigraphic_Age wikiPageWikiLink GSSP.
- Global_Standard_Stratigraphic_Age wikiPageWikiLink Geologic_period.
- Global_Standard_Stratigraphic_Age wikiPageWikiLink Geologic_record.
- Global_Standard_Stratigraphic_Age wikiPageWikiLink Geologic_time_scale.
- Global_Standard_Stratigraphic_Age wikiPageWikiLink Geology.
- Global_Standard_Stratigraphic_Age wikiPageWikiLink Global_Boundary_Stratotype_Section_and_Point.
- Global_Standard_Stratigraphic_Age wikiPageWikiLink International_Commission_on_Stratigraphy.
- Global_Standard_Stratigraphic_Age wikiPageWikiLink International_Union_of_Geological_Sciences.
- Global_Standard_Stratigraphic_Age wikiPageWikiLink List_of_GSSPs.
- Global_Standard_Stratigraphic_Age wikiPageWikiLink List_of_Global_Boundary_Stratotype_Sections_and_Points.
- Global_Standard_Stratigraphic_Age wikiPageWikiLink MN_zonation.
- Global_Standard_Stratigraphic_Age wikiPageWikiLink Megaannum.
- Global_Standard_Stratigraphic_Age wikiPageWikiLink North_American_Land_Mammal_Age.
- Global_Standard_Stratigraphic_Age wikiPageWikiLink North_American_land_mammal_age.
- Global_Standard_Stratigraphic_Age wikiPageWikiLink Paleontology.
- Global_Standard_Stratigraphic_Age wikiPageWikiLink Period_(geology).
- Global_Standard_Stratigraphic_Age wikiPageWikiLink Stratigraphy.
- Global_Standard_Stratigraphic_Age wikiPageWikiLink Stratum.
- Global_Standard_Stratigraphic_Age wikiPageWikiLink Tectonic.
- Global_Standard_Stratigraphic_Age wikiPageWikiLink Tectonics.
- Global_Standard_Stratigraphic_Age wikiPageWikiLink Type_locality_(geology).
- Global_Standard_Stratigraphic_Age wikiPageWikiLink Wikt:benchmark.
- Global_Standard_Stratigraphic_Age wikiPageWikiLink Year.
- Global_Standard_Stratigraphic_Age wikiPageWikiLinkText "Global Standard Stratigraphic Age".
- Global_Standard_Stratigraphic_Age hasPhotoCollection Global_Standard_Stratigraphic_Age.
- Global_Standard_Stratigraphic_Age wikiPageUsesTemplate Template:Chronology.
- Global_Standard_Stratigraphic_Age wikiPageUsesTemplate Template:Cite_journal.
- Global_Standard_Stratigraphic_Age wikiPageUsesTemplate Template:Cite_web.
- Global_Standard_Stratigraphic_Age wikiPageUsesTemplate Template:Geology_to_Paleobiology.
- Global_Standard_Stratigraphic_Age wikiPageUsesTemplate Template:Refbegin.
- Global_Standard_Stratigraphic_Age wikiPageUsesTemplate Template:Refend.
- Global_Standard_Stratigraphic_Age wikiPageUsesTemplate Template:Reflist.
- Global_Standard_Stratigraphic_Age subject Category:Earth_sciences.
- Global_Standard_Stratigraphic_Age subject Category:Geochronology.
- Global_Standard_Stratigraphic_Age subject Category:Geologic_time_scales_of_Earth.
- Global_Standard_Stratigraphic_Age subject Category:Stratigraphy.
- Global_Standard_Stratigraphic_Age subject Category:Units_of_time.
- Global_Standard_Stratigraphic_Age hypernym Point.
- Global_Standard_Stratigraphic_Age type Place.
- Global_Standard_Stratigraphic_Age type Science.
- Global_Standard_Stratigraphic_Age type Subfield.
- Global_Standard_Stratigraphic_Age type Unit.
- Global_Standard_Stratigraphic_Age comment "In the stratigraphy sub-discipline of geology, a Global Standard Stratigraphic Age, abbreviated GSSA, is a chronological reference point and criterion in the geologic record used to define the boundaries (an internationally sanctioned benchmark point) between different geological periods, epochs or ages on the overall geologic time scale in a chronostratigraphically useful rock layer. A worldwide multidisciplinary effort has been ongoing since 1974 to define such important metrics.".
- Global_Standard_Stratigraphic_Age label "Global Standard Stratigraphic Age".
- Global_Standard_Stratigraphic_Age sameAs m.05wtnj.
- Global_Standard_Stratigraphic_Age sameAs Q5570654.
- Global_Standard_Stratigraphic_Age sameAs Q5570654.
- Global_Standard_Stratigraphic_Age wasDerivedFrom Global_Standard_Stratigraphic_Age?oldid=683218511.
- Global_Standard_Stratigraphic_Age isPrimaryTopicOf Global_Standard_Stratigraphic_Age.