File:Chalk & impure chalk (Smoky Hill Chalk Member, Niobrara Formation, Upper Cretaceous; Monument Rocks, Kansas, USA) 76.jpg

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English: Chalk & impure chalk in the Cretaceous of Kansas, USA.

This western Kansas landscape consists of chalk badlands and chalk pillars. The rocks are chalks and impure chalks (e.g., argillaceous chalk and chalky shale) that range in color from whitish to light gray to yellowish. Chalk is a biogenic, calcitic, marine sedimentary rock composed of numerous coccolith microfossils (see: www.soes.soton.ac.uk/staff/tt/eh/pics/lith2.gif). Coccoliths are individual calcareous plates that covered a single-celled photosynthetic marine organism called a coccolithophorid (a.k.a. coccolithophore) (see: upload.wikimedia.org/wikipedia/commons/d/d9/Emiliania_hux...).

Stratigraphy: Smoky Hill Chalk Member (a.k.a. Smoky Hills Member), Niobrara Formation, mid-Upper Cretaceous

Locality: Monument Rocks (also known as the Chalk Pyramids), along Gove County Road 16, north of the Smoky Hill River, Gove County, western Kansas, USA (38° 47' 43.24" North latitude, 100° 45' 52.06" West longitude)
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Source https://www.flickr.com/photos/47445767@N05/52454314328/
Author James St. John

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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/52454314328. It was reviewed on 31 October 2022 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

31 October 2022

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current19:15, 31 October 2022Thumbnail for version as of 19:15, 31 October 20222,976 × 3,968 (7.59 MB)Ser Amantio di Nicolao (talk | contribs)Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/52454314328/ with UploadWizard

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