 | 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... 7 KB (749 words) - 23:38, 5 February 2024 |
 | representative of a specific interval of geologic time, and only this time span. Eonothem, erathem, system, series, subseries, stage, and substage are the hierarchical... 172 KB (9,469 words) - 02:14, 2 May 2024 |
 | time, from the shortest time span stage to the largest thickest strata eonothem and time spans eon. Concurrent work in other natural science fields required... 9 KB (1,121 words) - 17:49, 28 March 2024 |
The Phanerozoic eonothem can thus be divided into Cenozoic, Mesozoic, and Paleozoic erathems. Similarly, the Proterozoic eonothem is divided youngest... 8 KB (538 words) - 15:10, 22 March 2024 |
literature. The geological timescale has all systems in the Phanerozoic eonothem subdivided into series. Some of these have their own names, in other cases... 2 KB (268 words) - 08:12, 22 August 2022 |
 | used ICS Time Scale Definition Chronological unit Eon Stratigraphic unit Eonothem Time span formality Formal Lower boundary definition Ten oldest U-Pb zircon... 40 KB (4,114 words) - 08:46, 8 April 2024 |
usage Global (ICS) Definition Chronological unit Eon Stratigraphic unit Eonothem First proposed by Preston Cloud, 1972 Time span formality Formal Lower... 28 KB (3,042 words) - 03:58, 9 May 2024 |
chronostratigraphy Time spans in geochronology Notes to geochronological units Eonothem Eon 4 total, half a billion years or more Erathem Era 10 defined, several... 4 KB (373 words) - 00:37, 6 February 2024 |
 | used ICS Time Scale Definition Chronological unit Eon Stratigraphic unit Eonothem Time span formality Formal Lower boundary definition Defined Chronometrically... 21 KB (2,099 words) - 01:05, 30 April 2024 |
nearly finished with a task begun in 1974, subdividing the Phanerozoic eonothem into internationally accepted stages using two types of benchmark. For... 6 KB (716 words) - 16:33, 5 April 2024 |
chronostratigraphy Time spans in geochronology Notes to geochronological units Eonothem Eon 4 total, half a billion years or more Erathem Era 10 defined, several... 13 KB (1,626 words) - 15:52, 7 December 2023 |
chronostratigraphy Time spans in geochronology Notes to geochronological units Eonothem Eon 4 total, half a billion years or more Erathem Era 10 defined, several... 7 KB (744 words) - 21:35, 6 May 2024 |
the fossil assemblage rests. Chronostratigraphic units, with examples: eonothem – Phanerozoic erathem – Paleozoic system – Ordovician series – Upper Ordovician... 6 KB (657 words) - 19:04, 2 March 2024 |
 | multiple names: authors list (link) "GSSP at the base of the Phanerozoic Eonothem, Paleozoic Erathem, Cambrian System, Terreneuvian Series, and Fortunian... 9 KB (594 words) - 11:22, 31 March 2024 |
used ICS Time Scale Definition Chronological unit Eon Stratigraphic unit Eonothem First proposed by George Halcott Chadwick, 1930 Time span formality Formal... 59 KB (6,061 words) - 10:45, 19 April 2024 |
 | (strata) in chronostratigraphy Periods of time in geochronology Notes (Mars) Eonothem Eon not used for Mars Erathem Era not used for Mars System Period 3 total;... 16 KB (1,907 words) - 04:15, 3 April 2024 |
 | chronostratigraphy Time spans in geochronology Notes to geochronological units Eonothem Eon 4 total, half a billion years or more Erathem Era 10 defined, several... 16 KB (1,829 words) - 18:33, 19 February 2024 |
chronostratigraphy Time spans in geochronology Notes to geochronological units Eonothem Eon 4 total, half a billion years or more Erathem Era 10 defined, several... 5 KB (472 words) - 02:58, 2 May 2023 |
 | (strata) in chronostratigraphy Periods of time in geochronology Notes (Mars) Eonothem Eon not used for Mars Erathem Era not used for Mars System Period 3 total;... 46 KB (5,082 words) - 23:35, 26 March 2024 |
 | chronostratigraphy Time spans in geochronology Notes to geochronological units Eonothem Eon 4 total, half a billion years or more Erathem Era 10 defined, several... 19 KB (1,161 words) - 07:49, 6 May 2024 |
chronostratigraphy Time spans in geochronology Notes to geochronological units Eonothem Eon 4 total, half a billion years or more Erathem Era 10 defined, several... 4 KB (451 words) - 15:11, 4 May 2024 |
 | (strata) in chronostratigraphy Periods of time in geochronology Notes (Mars) Eonothem Eon not used for Mars Erathem Era not used for Mars System Period 3 total;... 18 KB (1,916 words) - 21:56, 5 April 2024 |
Huainan biota (category Proterozoic Eonothem of Asia) The Huainan biota is a collection of macroscopic skeletal organisms discovered in the early 1980s by Wang and Sun Weiguo in the Precambrian deposits of... 2 KB (283 words) - 00:50, 17 April 2024 |
Doushantuo Formation (category Proterozoic Eonothem of Asia) The Doushantuo Formation (formerly transcribed as Toushantuo or Toushantou, from Chinese: 陡山沱; pinyin: dǒu shān tuó; lit. 'steep mountain bay') is a geological... 16 KB (1,814 words) - 07:10, 26 February 2024 |
 | geologic time scale for context with proportional representation of eons/eonothems and eras/erathems mentioned on this page. Currently we are in the Cenozoic... 16 KB (757 words) - 00:30, 11 March 2024 |
 | Gunflint chert (category Proterozoic Eonothem of North America) The Gunflint chert (1.88 Ga) is a sequence of banded iron formation rocks that are exposed in the Gunflint Range of northern Minnesota and northwestern... 20 KB (2,313 words) - 04:28, 26 February 2024 |
Lantian Formation (category Proterozoic Eonothem of Asia) The Lantian Formation is a 150-meter-thick sequence of rocks deposited in Xiuning County, Anhui Province in southern China during a 90-million-year epoch... 4 KB (386 words) - 11:08, 12 June 2023 |
 | (strata) in chronostratigraphy Periods of time in geochronology Notes (Mars) Eonothem Eon not used for Mars Erathem Era not used for Mars System Period 3 total;... 28 KB (2,809 words) - 23:38, 26 March 2024 |
Middle Run Formation (category Proterozoic Eonothem of North America) The Middle Run Formation is a geologic formation in Ohio. It dates back to the Precambrian. It was discovered in October 1987 when the United States Geological... 2 KB (136 words) - 00:54, 4 May 2019 |