Gordon, Sheridan Co., Nebraska, USA
|Latitude & Longitude (WGS84):||42° 48' 17'' North , 102° 12' 10'' West|
|Latitude & Longitude (decimal):||42.80472,-102.20277|
|Köppen climate type:||Dfa : Hot-summer humid continental climate|
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1 valid mineral.
This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.
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5.333 - 23.03 Ma
|Ogallala Group or Formation|
Age: Miocene (5.333 - 23.03 Ma)
Stratigraphic Name: Ogallala Formation
Description: Silt, sand, sandstone, gravel and conglomerate. Predominantly interfingered fine- to coarse grained, poorly sorted, arkosic, fluvial deposits of light-gray, light-olive-gray, and grayish-green calcareous silt and sand, and locally poorly consolidated conglomerate, sandstone, and siltstone.
Comments: Lenses and tabular zones of carbonate-cemented silt and sand are common. In a few southeast localities, fine to coarse sand and fine gravel are cemented by yellowish-green opal or chaledony. Deposits contain some local beds of volcanic ash. Lithology varies laterally and vertically within a short distance. Includes in decending order: Ash Hollow and Valentine FMs. Approx. max thickness 650 ft. May contain some deposits of pre-Miocene age.
Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052.