File:Chalk badlands (Niobrara Formation, Upper Cretaceous; Castle Rock & nearby chalk bluffs, Gove County, Kansas, USA) 3 (38442722884).jpg
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Summary
DescriptionChalk badlands (Niobrara Formation, Upper Cretaceous; Castle Rock & nearby chalk bluffs, Gove County, Kansas, USA) 3 (38442722884).jpg |
Chalk in the Cretaceous of Kansas, USA. These are chalk outcrops near Castle Rock, a famous cluster of chalk pillars south of Quinter, Kansas. Chalk is a biogenic, calcitic, marine sedimentary rock composed of numerous coccolith microfossils (see: <a href="http://www.soes.soton.ac.uk/staff/tt/eh/pics/lith2.gif" rel="nofollow">www.soes.soton.ac.uk/staff/tt/eh/pics/lith2.gif</a>). Coccoliths are individual calcareous plates that covered a single-celled, photosynthesizing marine organism called a coccolithophorid (a.k.a. coccolithophore; "coccolithophorid" is not an adjective, contra Wikipedia) (see: <a href="https://upload.wikimedia.org/wikipedia/commons/d/d9/Emiliania_huxleyi_coccolithophore_(PLoS).png" rel="nofollow">upload.wikimedia.org/wikipedia/commons/d/d9/Emiliania_hux...</a>). Most chalks are Cretaceous in age ("creta" means "chalk"). The most famous example is the White Cliffs of Dover, along the southern shore of Britain. Weathered chalks in western Kansas range in color from white to pale yellowish to pale grayish. Stratigraphy: Smoky Hill Chalk Member (a.k.a. Smoky Hills Member), Niobrara Formation, Upper Cretaceous Locality: Castle Rock & adjacent bluffs, north of Gove County Road K & east of Castle Rock Road, 23 kilometers south-southeast of the town of Quinter, eastern Gove County, western Kansas, USA |
Date | |
Source | Chalk badlands (Niobrara Formation, Upper Cretaceous; Castle Rock & nearby chalk bluffs, Gove County, Kansas, USA) 3 |
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@N05/38442722884 (archive). It was reviewed on 12 October 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
12 October 2019
Items portrayed in this file
depicts
some value
13 June 2013
0.004 second
18 millimetre
200
image/jpeg
44a2ce1a43316a0502547f9141d3af4a578dd984
7,089,688 byte
2,049 pixel
4,201 pixel
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 06:35, 12 October 2019 | 4,201 × 2,049 (6.76 MB) | Ser Amantio di Nicolao | Transferred from Flickr via #flickr2commons |
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Date and time of digitizing | 18:24, 13 June 2013 |
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Date metadata was last modified | 20:14, 18 December 2017 |
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