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In 1941, a committee chaired by Horace E. Wood II compiled a list of 19 "provincial ages" for North America, later called North American Land Mammal Ages (NMLAs). An example of an NMLA is the Rancholabrean, named after the Rancho La Brea fossil site. One of its characteristic fossils is the bison, which first appears in the Rancholabrean. [7]
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The Mammal Neogene zones or MN zones are system of biostratigraphic zones in the stratigraphic record used to correlate mammal-bearing fossil localities of the Neogene period of Europe. It consists of seventeen consecutive zones (numbered MN 1 through MN 18; MN 7 and 8 have been joined into MN 7/8 zone) defined through reference faunas, well ...
"The History of Animal Evolution". Plant and Animal Evolution. University of Waikato. Archived from the original on 2016-06-27 Sequence of Animal Evolution; Yeo, Dannel; Drage, Thomas (2006). "History of Life on Earth". Archived from the original on 2015-03-15; Exploring Time. The Science Channel. 2007
c. 23.04 Ma – Neogene Period and Miocene epoch begin; c. 22 Ma – First hyenas. c. 20 Ma – Giraffes and giant anteaters evolve. c. 18–12 Ma – estimated age of the Hominidae/Hylobatidae (great apes vs. gibbons) split. c. 16 Ma – The hippopotamus evolves. c. 15 Ma – First mastodons, bovids, and kangaroos. Australian megafauna diversify.
' new life ') is Earth's current geological era, representing the last 66 million years of Earth's history. It is characterized by the dominance of mammals, insects, birds and angiosperms (flowering plants). It is the latest of three geological eras of the Phanerozoic Eon, preceded by the Mesozoic and Paleozoic.
The Neogene (/ ˈ n iː. ə dʒ iː n / NEE-ə-jeen, [6] [7]) is a geologic period and system that spans 20.45 million years from the end of the Paleogene Period 23.04 million years ago to the beginning of the present Quaternary Period 2.58 million years ago.
The Blancan North American Stage on the geologic timescale is the North American faunal stage according to the North American Land Mammal Ages chronology (NALMA), typically set from 4,750,000 to 1,806,000 years BP, a period of 1] It is usually considered to start in the early-mid Pliocene Epoch and end by the early Pleistocene. [2]