File:Lamprophyre dike & hornfels & country rock (Archean; Route 17 roadcut southeast of Princess Lake & north of Wawa, Ontario, Canada) 2 (48278201871).jpg
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Original file (4,000 × 3,000 pixels, file size: 10.55 MB, MIME type: image/jpeg)
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Summary
| Description |
The gray material at left is a dike composed of a rare igneous rock called lamprophyre. Such rocks are ultrapotassic, mafic to ultramafic, intrusive igneous rocks. This one is a gray hornblende lamprophyre with altered mantle xenoliths. The material at center is hornfels, a fine-grained contact metamorphic rock formed by heating of country rock by magma. Hornfels vary in mineral composition, depending on the nature of the original country rocks. The material at right is country rocks, through which the lamprophyre dike intruded. Geologic unit and age: Dubreuilville Dike, Archean Locality: Route 17 roadcut, south of the Route 519-Route 17 intersection, southeast of Princess Lake & north of the town of Wawa, Ontario, southeastern Canada (48° 15' 12.05" North latitude, 84° 52' 59.72" West longitude) See info. at: <a href="https://en.wikipedia.org/wiki/Lamprophyre" rel="noreferrer nofollow">en.wikipedia.org/wiki/Lamprophyre</a> and <a href="https://en.wikipedia.org/wiki/Hornfels" rel="noreferrer nofollow">en.wikipedia.org/wiki/Hornfels</a> |
| Date | |
| Source | Lamprophyre dike & hornfels & country rock (Archean; Route 17 roadcut southeast of Princess Lake & north of Wawa, Ontario, Canada) 2 |
| Author | James St. John |
Licensing
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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/48278201871 (archive). It was reviewed on 5 December 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 05:56, 5 December 2019 | | 4,000 × 3,000 (10.55 MB) | Ser Amantio di Nicolao | Transferred from Flickr via #flickr2commons |
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