File:Monzonite & syenite (Bearpaw Mountains, Hill County, Montana).jpg
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| Description |
English: Igneous dikes are planar to irregularly-planar intrusions that cut across country rocks. They can be thin or extremely thick; they can be vertically- or obliquely-oriented. In this sample, both the dark-colored monzonite and the light-colored syenite are dikes. The syenite has cut through the monzonite. The monzonite has cut through shonkinites (not seen here) of the Beaver Creek Stock, an Early Eocene intrusion dating to 50 to 54 million years.
Locality: small quarry adjacent to Beaver Creek Road (= Route 234), 1.4 miles south of the boundary of Rocky Boy's Indian Reservation & 8.1 miles south of the Beaver Creek Road-Sucker Creek Road intersection, Bearpaw Mountains, southeastern Hill County, northern Montana, USA |
| Date | |
| Source | https://www.flickr.com/photos/47445767@N05/51153988347/ |
| 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@N05/51153988347. It was reviewed on 6 May 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 | 19:19, 6 May 2021 | | 3,140 × 2,555 (5.89 MB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/51153988347/ with UploadWizard |
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