File:Halite salt casts (Carrara Formation, Cambrian) 2.jpg

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English: One of the most distinctive and environmentally diagnostic (and rare, in my experience) features in the sedimentary record is a halite salt cast.

Halite (NaCl - sodium chloride) is a relatively common mineral - it is abundantly preserved in ancient evaporite successions and modern evaporite settings. If seawater-soaked siliciclastic sediments dry out, halite crystals may form. Halite crystals will almost always have nice cubic forms, but they can have embayed faces. This mineral is readily soluble in water, so halite may precipitate and redissolve relatively quickly. The crystal forms may become preserved in the sediments, as casts. Preserved halite salt casts unquestionably demonstrate that the sedimentary environment was an evaporite setting.

Stratigraphy: attributed to the Carrara Formation (Cambrian)

Locality: unrecorded [the Carrara Formation outcrops in Nevada and California, western USA]
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Source https://www.flickr.com/photos/47445767@N05/50439955807/
Author James St. John

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This file is licensed under the Creative Commons Attribution 2.0 Generic license.
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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/50439955807. It was reviewed on 11 October 2020 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

11 October 2020

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current17:11, 11 October 2020Thumbnail for version as of 17:11, 11 October 20202,975 × 2,432 (5.39 MB)Ser Amantio di Nicolao (talk | contribs)Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/50439955807/ with UploadWizard

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