File:Curled mudcracks (Goblin Valley, Utah, USA) 6.jpg

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English: Modern mudcracks in Utah, USA.

Mudcracks are diagnostic sedimentary structures indicating subaerial exposure of sediment surfaces, with alternating wet & dry conditions. They are much more common that raindrop imprints, which indicate the same environmental setting. Mudcracks are most likely to occur in fine-grained siliciclastic sediments, fine-grained carbonate sediments, and in some evaporitic settings.

Mudcracks are distinctive and easy to identify, but they do vary in appearance. The cracks themselves vary in width, depth, and areal density. Mudcrack polygons also vary in size & shape. The edges of the mudcrack polygons shown above have curled upward as they dried out.

Locality: Goblin Valley State Park, southern Emery County, southeast-central Utah, USA
Date Taken on 24 June 2007, 13:29:27
Source https://www.flickr.com/photos/47445767@N05/29473413103/
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@N05/29473413103 (archive). It was reviewed on 2 March 2020 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

2 March 2020

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