Category:Niobrara Formation
geological formation in the United States of America | |||||
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The Niobrara Formation is a Cretaceous chalk and limestone geologic formation in the western United States, famous for its Paleobiota.
Subcategories
This category has the following 8 subcategories, out of 8 total.
Media in category "Niobrara Formation"
The following 21 files are in this category, out of 21 total.
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Annual distribution of Niobrara production (14172897020).png 480 × 291; 11 KB
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Annual report of the Regents - New York State Museum. (1908) (19340231256).jpg 2,586 × 716; 351 KB
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Daptinus holotype.jpg 1,168 × 1,206; 494 KB
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KansasPopRock1.jpg 1,080 × 718; 1.33 MB
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KansasPopRock2.jpg 1,080 × 718; 1.42 MB
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Monument Rocks (5758067981).jpg 1,600 × 1,067; 399 KB
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Monument Rocks (5758612890).jpg 1,600 × 1,129; 386 KB
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Niobrara, opalized, Ellis County 20180915 110441.jpg 2,249 × 1,776; 1.11 MB
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Niobrara, opalized, Ellis County 20180915 110448.jpg 4,032 × 2,268; 3.66 MB
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Ogallala opaline sandstone with weathered silcrete 20201115 195900.jpg 2,195 × 2,000; 1.19 MB
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Pseudoperna congesta fossil osyters encrusting a Platyceramus platinus shell.jpg 4,000 × 3,000; 3.79 MB
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Southwestern Wyoming Upper Cretaceous Unit cross section.jpg 1,122 × 783; 136 KB
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The sea which once covered the plains.jpg 1,142 × 791; 313 KB
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United States Shale gas plays, May 2011.pdf 1,650 × 1,275; 386 KB