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It preserves fossils dating to the Miocene epoch of the Neogene period and is particularly noted for Canid fossils. [2] [3] This unit consists of loosely-consolidated sandstone that crumbles easily. These sands carry the water of the Ogallala Aquifer and is the source of much of the water in the Niobrara River. [1]
Faced with particularly rich collections of terrestrial Neogene vertebrate fossils, Nebraska geologists recognized the distinct North American land mammal ages (NALMA) within the Ogallala; Clarendonian, Hemphillian, and Blancan sufficient to attempt definitions of formations on a biostratigraphic basis. The Ogallala's rich grass seed record was ...
Lagerstätte – Sedimentary deposit with well-preserved extraordinary fossils; Lists of dinosaur-bearing stratigraphic units; List of fossil parks around the world – Following is a list of protected areas where fossils are preserved, known as fossil parks; List of fossil parks in India; Pleistocene fossils in Michigan; List of human ...
The ecology of the Great Plains is diverse, largely owing to their great size. Differences in rainfall, elevation, and latitude create a variety of habitats including short grass, mixed grass, and tall-grass prairies, and riparian ecosystems. [1] The Great Plains extend from Mexico in the south through the central United States to central ...
The great plains also has many invertebrate species living here both alive and extinct such as the American burying beetle (Nicrophorus americus), Salt Creek Tiger Beetle (Cinidela nevadica lincolniana), Great Plains Giant Tiger Beetle (Amblycheila chylindriformis), Microstylum morosum, [21] Bean leaf beetle (Cerotoma trifurcata), Great Plains ...
The presence of bodies of flowing water like rivers or streams is recorded in the terrestrial sediments of the Catahoula Formation. Fossils from this ancient environment are rare, but include petrified wood. [11] During the Miocene epoch of the ensuing Neogene period west-central Louisiana held a coastal plain.
It underlies much of the Great Plains of the US and Canada. Evidence of vertebrate life is common throughout the formation and includes specimens of plesiosaurs, mosasaurs, pterosaurs, and several primitive aquatic birds. The type locality for the Niobrara Chalk is the Niobrara River in Knox County in northeastern Nebraska.
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.