File:Metatuffs (Cranberry Island Series, Upper Silurian, 424 Ma; Seawall Beach, Mt. Desert Island, Maine, USA) 13.jpg
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English: Rhyolitic metatuffs in the Silurian of Maine, USA.
In the Mt. Desert Island area of coastal Maine, felsic and mafic volcanic rocks of Late Silurian age occur near the Cadillac Mountain Granite, a large mid-Paleozoic pluton. The rocks were erupted when the island was a large volcanic center. The granite body is the remains of the solidified magma chamber beneath that ancient volcano. The volcanic succession, called the Cranberry Island Series, mostly consists of rhyolitic volcanic breccias, volcanic tuffs, and rhyolite lava flows. Mafic tuffs and basalt lava flows occur at the top. Seen here are metamorphosed rhyolitic volcanic tuffs in the middle member of the series, which is the most voluminous of the three members. Stratigraphy: upper Middle Member, Cranberry Island Series, Upper Silurian, 424 Ma Locality: Seawall Beach, Acadia National Park, Mt. Desert Island, Maine, USA Some info. from: Seaman et al. (1995) - Volcanic expression of bimodal magmatism: the Cranberry Island-Cadillac Mountain complex, coastal Maine. Journal of Geology 103: 301-311. |
| Date | |
| Source | https://www.flickr.com/photos/47445767@N05/50082262546/ |
| 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@N05/50082262546. It was reviewed on 25 August 2020 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
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| current | 06:13, 25 August 2020 | | 3,006 × 1,558 (4.15 MB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/50082262546/ with UploadWizard |
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