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erathem

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  • Erathem — In stratigraphy, paleontology, geology, and geobiology an erathem is the total stratigraphic record deposited during a certain corresponding span of time, an era in the geologic timescale. NOTOC It can therefore be used as a chronostratigraphic… …   Wikipedia

  • erathem — ēˈrathem noun (geology) The stratigraphical unit of rock strata corresponding to a geological era • • • Main Entry: ↑era …   Useful english dictionary

  • Geologic time scale — This clock representation shows some of the major units of geological time and definitive events of Earth history. The Hadean eon represents the time before fossil record of life on Earth; its upper boundary is now regarded as 4.0 Ga.[1] Other… …   Wikipedia

  • Neogene — Period 23.03–2.588 million years ago …   Wikipedia

  • Pleistocene — The Pleistocene (IPAEng| plaɪstəsi:n) is the epoch from 1.8 million to 10,000 years BP covering the world s recent period of repeated glaciations. The name pleistocene is derived from the Greek Polytonic|πλεῖστος ( pleistos most ) and… …   Wikipedia

  • Geochronology — A schematic depiction of the major events in the history of our planet. Geochronology is the science of determining the age of rocks, fossils, and sediments, within a certain degree of uncertainty inherent to the method used. A variety of dating… …   Wikipedia

  • Eoarchean — In the geologic record the Eoarchean erathem (pronEng|ˌiːoʊɑrˈkiːən, also spelled Eoarchaean) and the Eoarchean era in the geologic timescale correspond to one another in the dual system of classification of rock strata laid down beginning 4000… …   Wikipedia

  • Maastrichtian — System Series Stage Age (Ma) Paleogene Paleocene Danian younger Cretaceous Upper …   Wikipedia

  • Danian — System Series Stage Age (Ma) Neogene Miocene Aquitanian younger Paleogene Oligocene …   Wikipedia

  • Chronostratigraphy — is the branch of stratigraphy that studies the age of rock strata in relation to time. The ultimate aim of chronostratigraphy is to arrange the sequence of deposition and the time of deposition of all rocks within a geological region, and… …   Wikipedia

  • Chronozone — For articles dealing with the fundamentals of geologic chronology, see: Biostratigraphy#Concept of zone, chronology (geology), and geologic time scale e  h Units in geochronology and stratigraphy …   Wikipedia

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