Definition of Eonothems. Meaning of Eonothems. Synonyms of Eonothems

- within the eonothem. Eonothems have the same names as their corresponding eons, which means during the history of the Earth only four eonothems were formed...
- Erathems are not often used in practice. While they are subdivisions of eonothems and are themselves subdivided into systems, dating experts prefer the...
- usage Global (ICS) Definition Chronological unit Eon Stratigraphic unit Eonothem First proposed by Preston Cloud, 1972 Time span formality Formal Lower...
- used ICS Time Scale Definition Chronological unit Eon Stratigraphic unit Eonothem Time span formality Formal Lower boundary definition Ten oldest U-Pb zircon...
- largest geochronologic time unit and is equivalent to a chronostratigraphic eonothem. There are four formally defined eons: the Hadean, Archean, Proterozoic...
- used ICS Time Scale Definition Chronological unit Eon Stratigraphic unit Eonothem Time span formality Formal Lower boundary definition Defined Chronometrically...
- chronostratigraphy Time spans in geochronology Notes to geochronological units Eonothem Eon 4 total, half a billion years or more Erathem Era 10 defined, several...
- (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;...
- chronostratigraphy Time spans in geochronology Notes to geochronological units Eonothem Eon 4 total, half a billion years or more Erathem Era 10 defined, several...
- nearly finished with a task begun in 1974, subdividing the Phanerozoic eonothem into internationally accepted stages using two types of benchmark. For...