File:Butte Quartz Monzonite (Late Cretaceous, 76 Ma; north of Butte, Montana, USA) 2.jpg
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English: Quartz monzonite with weathering stains in the Cretaceous of Montana, USA.
Seen here is part of a spheroidally-weathered quartz monzonite boulder near Butte, Montana. The rocks in the area have been richly mineralized with copper sulfides and other metallic minerals. Geologic unit: Butte Quartz Monzonite, Campanian Stage, late Late Cretaceous, 76 Ma Locality: boulder between Moulton Reservoir Road and Yankee Doodle Tailings Pond, north of the town of Butte, northern Silver Bow County, western Montana, USA |
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| Source | https://www.flickr.com/photos/47445767@N05/50973364248/ |
| 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@N05/50973364248. It was reviewed on 24 February 2021 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 | |
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| current | 14:59, 24 February 2021 | | 3,008 × 2,000 (4.73 MB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/50973364248/ with UploadWizard |
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