File:Shattercone (Eocene, 39 Ma; Haughton Impact Structure, Devon Island, northern Canada) 1 (16677971040).jpg
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| Description |
Shatterconed limestone from the Eocene of Canada. (16.6 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. Shattercones are striated conical structures in rocks formed by a powerful shock wave or pressure front moving through during an impact event. They have a three-dimensional cone-like structure, with the points of the cones directed toward the shock wave origination site. Undisturbed shatterconed rocks will have the apex of the cones pointing toward the direction of the incoming object (i.e., upward - toward space). |
| Date | |
| Source | Shattercone (Eocene, 39 Ma; Haughton Impact Structure, Devon Island, northern Canada) 1 |
| 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@N05/16677971040 (archive). It was reviewed on 6 December 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 01:59, 6 December 2019 | | 3,767 × 2,083 (3.46 MB) | Ser Amantio di Nicolao (talk | contribs) | Transferred from Flickr via #flickr2commons |
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