File:Lamprophyre breccia (Dubreuilville Dike, Archean; Route 17 roadcut southeast of Princess Lake & north of Wawa, Ontario, Canada) 1 (48312820706).jpg
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[edit]DescriptionLamprophyre breccia (Dubreuilville Dike, Archean; Route 17 roadcut southeast of Princess Lake & north of Wawa, Ontario, Canada) 1 (48312820706).jpg |
Lamprophyre breccia in the Precambrian of Ontario, Canada. This is part of an igneous dike composed of a rare igneous rock called lamprophyre. Such rocks are ultrapotassic, mafic to ultramafic, intrusive igneous rocks. This one is a gray hornblende lamprophyre. Altered mantle xenoliths composed of actinolite and talc are common. The outcrop seen here is lamprophyre breccia, consisting of rounded to angular, dark-colored lamprophyre clasts in a light-colored matrix. Description from Wilson (2006): This dike may be the one described by Higgins (1986). He reported that the dike consists of 60% euhedral amphibole, 20% biotite replacing amphibole and 15% plagioclase. Geologic unit and age: Dubreuilville Dike, Archean Locality: Route 17 roadcut, south of the Route 519-Route 17 intersection, southeast of Princess Lake & north of the town of Wawa, Ontario, southeastern Canada (48° 15' 12.05" North latitude, 84° 52' 59.72" West longitude) See info. at: <a href="https://en.wikipedia.org/wiki/Lamprophyre" rel="noreferrer nofollow">en.wikipedia.org/wiki/Lamprophyre</a> References cited: Higgins (1986) - Nodule-bearing spessartite (lamprophyre) dike near Wawa, northern Ontario. GAC-MAC-GCU-AGC-AMC-UCG Program with Abstracts 11: 81. Wilson (2006) - Unusual diamond-bearing rocks of the Wawa area. Institute on Lake Superior Geology, 52nd Annual Meeting, Sault Ste. Marie, Ontario 52(3). |
Date | |
Source | Lamprophyre breccia (Dubreuilville Dike, Archean; Route 17 roadcut southeast of Princess Lake & north of Wawa, Ontario, Canada) 1 |
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@N05/48312820706 (archive). It was reviewed on 5 December 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
5 December 2019
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current | 05:57, 5 December 2019 | ![]() | 4,000 × 3,000 (9.39 MB) | Ser Amantio di Nicolao (talk | contribs) | Transferred from Flickr via #flickr2commons |
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Camera manufacturer | Canon |
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ISO speed rating | 80 |
Date and time of data generation | 07:07, 13 July 2012 |
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Orientation | Normal |
Number of components | 3 |
Horizontal resolution | 180 dpi |
Vertical resolution | 180 dpi |
Software used | Adobe Photoshop Elements 16.0 (Macintosh) |
File change date and time | 02:19, 18 July 2019 |
Y and C positioning | Co-sited |
Exif version | 2.21 |
Date and time of digitizing | 07:07, 13 July 2012 |
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Maximum land aperture | 3.625 APEX (f/3.51) |
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Digital zoom ratio | 1 |
Scene capture type | Landscape |
Lens used | 6.2-18.6 mm |
Date metadata was last modified | 22:19, 17 July 2019 |
Unique ID of original document | 6C1BD296A3D250FD728936ED10EEEFF6 |