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File:Post-impact, low-temperature, fracture-filling gypsum ("selenite") (Eocene, 39 Ma; Haughton Impact Structure, Devon Island, northern Canada) 2.jpg

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English: Fracture-filling gypsum ("selenite") from the Eocene of Canada. (13.8 centimeters across at its widest) (Centre for Planetary Science and Exploration collection, London, Ontario, Canada)

The Eocene-aged (39 Ma) Haughton Impact Structure is located on Devon Island in northern Canada. The target rocks were Middle and Lower Paleozoic sedimentary rocks, floored by Precambrian metamorphic rocks. Clasts of these surface and subsurface target rocks occur in abundance at the Haughton Structure, eroding from impact breccias. Shattercones also occur, sometimes in sufficient abundance to trip over them.

The rock seen here is a very post-impact, low-temperature vein filling of macrocrystalline gypsum ("selenite").
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Source https://www.flickr.com/photos/47445767@N05/16249159133/
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@N05/16249159133. It was reviewed on 26 March 2024 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

26 March 2024

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current20:20, 26 March 2024Thumbnail for version as of 20:20, 26 March 20243,963 × 1,834 (2.49 MB)Ser Amantio di Nicolao (talk | contribs)Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/16249159133/ with UploadWizard

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