File:Granite (Mt. Airy Pluton, 331-337 Ma, Middle Mississippian; Mt. Airy, North Carolina, USA) (51360448811).jpg

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Granite in the Mississippian of North Carolina, USA

This is an outcrop of "Mt. Airy Granite" in Mt. Airy, North Carolina. It is quarried nearby for the decorative stone trade. The rocks are part of the Mt. Airy Pluton and range from monzogranites (= true granites) to granodiorites. The pluton was emplaced during the Late Paleozoic. This was a time of subduction and tectonic collision in eastern America as the Appalachian Mountains formed.

The slightly curved, gently dipping fracture surfaces are sheeting joints, which form by pressure release and exfoliation of large igneous masses.

Geologic unit: Mt. Airy Pluton, Middle Mississippian, 331 to 337 Ma

Locality: outcrop behind a drug store at the corner of Route 89 and Route 52 in the town of Mt. Airy, northeastern Surry County, northwestern North Carolina, USA (~36° 29.992’ North latitude, ~80° 37.254’ West longitude)
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Source Granite (Mt. Airy Pluton, 331-337 Ma, Middle Mississippian; Mt. Airy, North Carolina, USA)
Author James St. John

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This file is licensed under the Creative Commons Attribution 2.0 Generic license.
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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/51360448811. It was reviewed on 20 January 2022 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

20 January 2022

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current00:26, 20 January 2022Thumbnail for version as of 00:26, 20 January 20221,128 × 939 (984 KB)SeichanGant (talk | contribs)Transferred from Flickr via #flickr2commons

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