File:Cinder cone volcano (~7.36 ka, Holocene; Grassy Cone, Craters of the Moon Lava Field, Snake River Plain, Idaho, USA) 3.jpg
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English: Cinder cone in the Holocene of Idaho, USA.
Grassy Cone is a dormant, vegetation-covered cinder cone volcano in Idaho's Craters of the Moon Lava Field. Cinder cones are relatively small, steep-sided cones of loose igneous debris. They have few eruptions and a relatively large summit crater. Cinder cones are principally composed of scoria and vesicular basalt. This one was active in the Holocene - a lava flow sourced to Grassy Cone dates to ~7,360 years ago. The summit crater area is complex and shows remnants of five separate, partly-overlapping craters. When it was active, it erupted basaltic lava, air-fall ash, and air-fall lapilli. When seen in map view, Grassy Cone is elongated, not subcircular in shape as most cinder cones are. Locality: Grassy Cone (view from North Crater Trail), northwestern side of Route 53, northwestern corner of Craters of the Moon National Monument, northern margin of the Snake River Plain, southern Idaho, USA (43˚ 27' 18.05" North latitude, 113˚ 34' 55.78" West longitude) |
| Date | |
| Source | https://www.flickr.com/photos/47445767@N05/49432112847/ |
| 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@N05/49432112847 (archive). It was reviewed on 27 January 2020 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
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| current | 21:41, 27 January 2020 | | 2,976 × 1,809 (3.5 MB) | Ser Amantio di Nicolao (talk | contribs) | User created page with UploadWizard |
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