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- Eonothem abstract "In stratigraphy and geology, an eonothem is the totality of rock strata laid down in the stratigraphic record deposited during a certain eon of the continuous geologic timescale. The eonothem is not to be confused with the eon itself, which is a corresponding division of geologic time spanning a specific amount of (millions of) years, during which rocks were formed that are classified within the eonothem. In practice, the rock column is discontinuous: Eonothems, despite discontinuities (locally missing strata or unconformities), can be compared to others where the rock record is more complete and by correlation of points of correspondence be fixed appropriately within the eon. Eonothems are therefore useful as a broad chronostratigraphic unit, specifying approximate age within the timelines within the rock column. Eonothems are subdivided into erathems and their smaller subdivisions within geology and paleobiology and their sub-fields, and a whole system of cross-disciplinary classification by strata is in place with oversight by the International Commission on Stratigraphy. Since oldest rocks are deposited first and lowest in a stratigraphic section, whether one is discussing the rock record is usually clear in context. (A fossil or feature present in the "upper Phanerozoic" eonothem (strata) would be discussed as being dated within the "later Phanerozoic" eon, whereas something found in the middle Phanerozoic could be discussing a layer, stage or the relative time.)Eonothems are not often used in practice as expert dating estimates can be and usually are specified into the more refined timelines of smaller chronostratigraphic units, which can be subdivided in turn down to the many defined stages, the smallest units used in dating. (see the hierarchy of comparative units, five each for time division types and five for the rock record types.)Eonothems have the same names as their corresponding eons, which means during the history of the Earth only four eonothems were formed. Oldest to newest these are the Hadean, Archean, Proterozoic, and Phanerozoic.".
- Eonothem thumbnail Horseshoe_Canyon_Alberta_Nov_1988.jpg?width=300.
- Eonothem wikiPageExternalLink gssp.htm.
- Eonothem wikiPageExternalLink md08.html.
- Eonothem wikiPageExternalLink aeon.
- Eonothem wikiPageExternalLink etyindex.html.
- Eonothem wikiPageExternalLink geotime.htm.
- Eonothem wikiPageExternalLink cheu.pdf.
- Eonothem wikiPageExternalLink over.htm.
- Eonothem wikiPageExternalLink timeform.html.
- Eonothem wikiPageExternalLink gtime1.html.
- Eonothem wikiPageID "17736936".
- Eonothem wikiPageLength "6196".
- Eonothem wikiPageOutDegree "39".
- Eonothem wikiPageRevisionID "683218265".
- Eonothem wikiPageWikiLink Archean.
- Eonothem wikiPageWikiLink Body_form.
- Eonothem wikiPageWikiLink Body_plan.
- Eonothem wikiPageWikiLink Category:Chronostratigraphy.
- Eonothem wikiPageWikiLink Category:Earth_sciences.
- Eonothem wikiPageWikiLink Category:Geological_eras.
- Eonothem wikiPageWikiLink Chronostratigraphy.
- Eonothem wikiPageWikiLink Continuous_function.
- Eonothem wikiPageWikiLink Eon_(geology).
- Eonothem wikiPageWikiLink Erathem.
- Eonothem wikiPageWikiLink Fauna.
- Eonothem wikiPageWikiLink Fauna_(animals).
- Eonothem wikiPageWikiLink Fossil.
- Eonothem wikiPageWikiLink Fossil_record.
- Eonothem wikiPageWikiLink Geobiology.
- Eonothem wikiPageWikiLink Geologic_record.
- Eonothem wikiPageWikiLink Geologic_time_scale.
- Eonothem wikiPageWikiLink Geologic_timescale.
- Eonothem wikiPageWikiLink Geology.
- Eonothem wikiPageWikiLink Global_Boundary_Stratotype_Section_and_Point.
- Eonothem wikiPageWikiLink Hadean.
- Eonothem wikiPageWikiLink History_of_Earth.
- Eonothem wikiPageWikiLink History_of_the_Earth.
- Eonothem wikiPageWikiLink International_Commission_on_Stratigraphy.
- Eonothem wikiPageWikiLink Lithostratigraphy.
- Eonothem wikiPageWikiLink Mya_(unit).
- Eonothem wikiPageWikiLink Paleobiology.
- Eonothem wikiPageWikiLink Phanerozoic.
- Eonothem wikiPageWikiLink Proterozoic.
- Eonothem wikiPageWikiLink Stage_(geology).
- Eonothem wikiPageWikiLink Stage_(stratigraphy).
- Eonothem wikiPageWikiLink Stratigraphy.
- Eonothem wikiPageWikiLink Stratum.
- Eonothem wikiPageWikiLink Type_locality_(geology).
- Eonothem wikiPageWikiLink Unconformity.
- Eonothem wikiPageWikiLink Year.
- Eonothem wikiPageWikiLink File:Horseshoe_Canyon_Alberta_Nov_1988.jpg.
- Eonothem wikiPageWikiLink File:Péry-Reuchenette_Oxfordian.JPG.
- Eonothem wikiPageWikiLinkText "eonothem".
- Eonothem hasPhotoCollection Eonothem.
- Eonothem wikiPageUsesTemplate Template:Chronology.
- Eonothem wikiPageUsesTemplate Template:Cquote.
- Eonothem wikiPageUsesTemplate Template:Geology_to_Paleobiology.
- Eonothem wikiPageUsesTemplate Template:Reflist.
- Eonothem subject Category:Chronostratigraphy.
- Eonothem subject Category:Earth_sciences.
- Eonothem subject Category:Geological_eras.
- Eonothem hypernym Totality.
- Eonothem type Science.
- Eonothem type Subfield.
- Eonothem comment "In stratigraphy and geology, an eonothem is the totality of rock strata laid down in the stratigraphic record deposited during a certain eon of the continuous geologic timescale. The eonothem is not to be confused with the eon itself, which is a corresponding division of geologic time spanning a specific amount of (millions of) years, during which rocks were formed that are classified within the eonothem.".
- Eonothem label "Eonothem".
- Eonothem sameAs Eonoteem.
- Eonothem sameAs Эанатэма.
- Eonothem sameAs Eonotema.
- Eonothem sameAs Ladem.
- Eonothem sameAs چینهابردوران.
- Eonothem sameAs Éonothème.
- Eonothem sameAs Eonotema.
- Eonothem sameAs 누대층.
- Eonothem sameAs Eonothem.
- Eonothem sameAs Eonotem.
- Eonothem sameAs m.047fqtv.
- Eonothem sameAs Эонотема.
- Eonothem sameAs Еонотема.
- Eonothem sameAs Liên_giới_(địa_tầng).
- Eonothem sameAs Q2669627.
- Eonothem sameAs Q2669627.
- Eonothem wasDerivedFrom Eonothem?oldid=683218265.
- Eonothem depiction Horseshoe_Canyon_Alberta_Nov_1988.jpg.
- Eonothem isPrimaryTopicOf Eonothem.