File:Rhyolites (Nez Perce Creek Flow, Middle Pleistocene, ~152 ka; Firehole Falls, Yellowstone, Wyoming, USA) (20189256676).jpg
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| Description |
Rhyolite lava flow in the Pleistocene of Wyoming, USA. The gray rocks here are part of a rhyolite lava flow that erupted in the Yellowstone Caldera during the last Ice Age (Pleistocene). Yellowstone itself is an enormous hotspot volcano - it has semi-regular, giant ash eruptions every 600,000 to 650,000 years or so. After Yellowstone's last mega-eruption and caldera collapse (at ~640 ka), relatively minor volcanic activity occurred in the caldera. Most of this consisted of rhyolite lava flow volcanism, but some basalt lava flow volcanism also took place. The rhyolites shown above are part of the Nez Perce Creek Flow (Central Plateau Member, Plateau Rhyolite, upper Middle Pleistocene, ~152 ka (148-160 ka)). This lava flow is well exposed in a series of roadcuts along Firehole Canyon Drive in Yellowstone National Park. Rocks there include gray rhyolites, finely-fractured obsidian, and rhyolite breccias having obsidian clasts. Locality: Firehole Falls, Firehole Canyon, western Yellowstone National Park, northwestern Wyoming, USA |
| Date | |
| Source | Rhyolites (Nez Perce Creek Flow, Middle Pleistocene, ~152 ka; Firehole Falls, Yellowstone, Wyoming, USA) |
| 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@N05/20189256676. It was reviewed on 10 October 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 | 01:49, 10 October 2019 | | 3,470 × 3,000 (8.22 MB) | Ser Amantio di Nicolao (talk | contribs) | Transferred from Flickr via #flickr2commons |
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