Английская Википедия:Gering Formation

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The Gering Formation is a geologic group in Nebraska. It preserves fossils dating back to the Paleogene period.[1] The formation is made of layers of very fine-grained, volcaniclastic sandstone and thin, horizontally stratified pale-to-gray brown sandstone, as well as sand crystals and ash beds.[2]

See also

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References

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Шаблон:Nebraska-geologic-formation-stub Шаблон:Paleogene-stub