File:Air-fall tachylite cinders (Holocene, 2.4 ka; summit of Inferno Cone, Craters of the Moon Lava Field, Idaho, USA) 1.jpg
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| Description |
English: Tachylite cinders in the Holocene of Idaho, USA.
The blackish-colored material seen here is at the summit of Inferno Cone, a cinder cone volcano in southern Idaho's Craters of the Moon Lava Field. These pieces are "cinders" formed during a volcanic eruption, but they did not originate from Inferno Cone. They were erupted into the air about 2,400 years ago from a vent in the nearby Big Craters cinder cone complex. Winds blew the cinders laterally and many fell at Inferno Cone. The air-fall cinder deposit is less than 1 meter thick at this site. The cinders themselves could be referred to as "scoria", a frothy-textured, mafic, extrusive igneous rock. The solid portions of the cinders are glassy (= no crystals at all) with numerous vesicles that were gas bubbles in lava. Rocks composed of mafic glass are known as "tachylite", which can be vesiculated and frothy-textured, or not. Many of the cinders here have a bluish iridescence. Locality: summit of Inferno Cone, Craters of the Moon National Monument, Snake River Plain, southern Idaho, USA See tachylite info. at: en.wikipedia.org/wiki/Tachylite |
| Date | |
| Source | https://www.flickr.com/photos/47445767@N05/49491087592/ |
| 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@N05/49491087592 (archive). It was reviewed on 5 February 2020 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
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| current | 06:46, 5 February 2020 | | 3,008 × 2,000 (3.77 MB) | Ser Amantio di Nicolao (talk | contribs) | User created page with UploadWizard |
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