File:Bulletin 426 Plate II A Quarries near Glen Echo.jpg
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English: Plate II A, original caption: "Granite quarry near Glen Echo, Maryland, showing joints and faults." Photo c. 1910. Text from the volume describing this figure: Jointing, both vertical and horizontal, is prominently developed in the Maryland granites (see Pl. II, A, B), and a third set of diagonal joints is distinct in many of the quarries. |
| Date | |
| Source | Granites of the Southeastern Atlantic States, Bulletin 426, United States Geological Survey, Government Printing Office, Washington, 1910. |
| Author | Watson, Thomas Leonard |
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This work is in the public domain in the United States because it is a work prepared by an officer or employee of the United States Government as part of that person’s official duties under the terms of Title 17, Chapter 1, Section 105 of the US Code.
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| current | 14:00, 30 March 2016 | | 1,294 × 858 (111 KB) | Jstuby (talk | contribs) | cropped white border to remove remnants of text |
| 15:44, 28 March 2016 |  | 1,312 × 890 (82 KB) | Jstuby (talk | contribs) | User created page with UploadWizard |
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