File:Differentially eroded siltstone (gravel bar clast, Licking River, near Black Hand Gorge, Licking County, Ohio, USA).jpg

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English: (~6.5 centimeters across at its widest)

Differential weathering and differential erosion are surface processes involving soft rocks weathering/eroding quickly and hard rocks weathering/eroding slowly. Different portions of rocks will weather and erode and different rates, depending on the durability and chemical reactivity of individual components (grains, minerals).

Seen here is siltstone, a common siliciclastic sedimentary rock. The elongated donut hole shape is merely from differential weathering and erosion.

Stratigraphic provenance: possibly from local Lower Mississippian siliciclastics (Cuyahoga Formation or Logan Formation)

Locality: loose clast from a Licking River gravel bar near Black Hand Gorge, eastern Licking County, east-central Ohio, USA
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Source https://www.flickr.com/photos/47445767@N05/50347063671/
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@N05/50347063671. It was reviewed on 22 October 2020 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

22 October 2020

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Date/TimeThumbnailDimensionsUserComment
current18:36, 22 October 2020Thumbnail for version as of 18:36, 22 October 20202,695 × 1,403 (2.29 MB)Ser Amantio di Nicolao (talk | contribs)Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/50347063671/ with UploadWizard

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