File:Anorthosite xenolith (anorthosite series, Duluth Complex, Mesoproterozoic, 1099 Ma; Keene Creek East Skyline Parkway roadcut, Duluth, Minnesota, USA) 5 (22040450638).jpg
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Summary[edit]
DescriptionAnorthosite xenolith (anorthosite series, Duluth Complex, Mesoproterozoic, 1099 Ma; Keene Creek East Skyline Parkway roadcut, Duluth, Minnesota, USA) 5 (22040450638).jpg |
Anorthosite in the Precambrian of Minnesota, USA. This is part of a large anorthosite xenolith that is hosted in gabbro of the widespread Duluth Complex, a ~1.1 billion year old suite of igneous rocks in northeastern Minnesota that is associated with volcanism in the Lake Superior segment of the ancient Mid-Continent Rift System. Anorthosite is a mafic, phaneritic (coarsely-crystalline), intrusive igneous rock dominated by the mineral plagioclase feldspar - (Ca,Na)Al2Si2O8 - calcium sodium aluminosilicate. The brownish areas are a weathering crust. Geologic unit & age of host rocks (not seen in this photo): anorthosite series, Duluth Complex, late Mesoproterozoic, 1099 Ma Age of anorthosite xenolith: unknown, but Precambrian, likely derived from the lower crust Locality: Keene Creek East outcrop - roadcut along the northern side of Skyline Parkway, Duluth, northeastern Minnesota, USA (46° 45’ 08.52” North, 92° 10’ 29.93” West) |
Date | |
Source | Anorthosite xenolith (anorthosite series, Duluth Complex, Mesoproterozoic, 1099 Ma; Keene Creek East Skyline Parkway roadcut, Duluth, Minnesota, USA) 5 |
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@N05/22040450638 (archive). It was reviewed on 9 October 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
9 October 2019
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 06:17, 9 October 2019 | 4,000 × 3,000 (4.42 MB) | Ser Amantio di Nicolao (talk | contribs) | Transferred from Flickr via #flickr2commons |
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Metadata
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Camera manufacturer | Canon |
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Camera model | Canon PowerShot D10 |
Exposure time | 1/125 sec (0.008) |
F-number | f/8 |
ISO speed rating | 80 |
Date and time of data generation | 08:46, 7 June 2015 |
Lens focal length | 6.2 mm |
Image title | |
Width | 4,000 px |
Height | 3,000 px |
Bits per component |
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Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Horizontal resolution | 180 dpi |
Vertical resolution | 180 dpi |
Software used | Adobe Photoshop Elements 13.0 (Macintosh) |
File change date and time | 16:37, 16 October 2015 |
Y and C positioning | Co-sited |
Exif version | 2.21 |
Date and time of digitizing | 08:46, 7 June 2015 |
Meaning of each component |
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Image compression mode | 3 |
APEX shutter speed | 6.96875 |
APEX aperture | 6 |
APEX exposure bias | −0.33333333333333 |
Maximum land aperture | 2.96875 APEX (f/2.8) |
Metering mode | Pattern |
Flash | Flash did not fire, compulsory flash suppression |
Supported Flashpix version | 1 |
Color space | sRGB |
Focal plane X resolution | 16,460.905349794 |
Focal plane Y resolution | 16,483.516483516 |
Focal plane resolution unit | inches |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Custom image processing | Normal process |
Exposure mode | Manual exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Scene capture type | Portrait |
Lens used | 6.2-18.6 mm |
Date metadata was last modified | 10:37, 16 October 2015 |
Unique ID of original document | 76DECBBCC75EC6DF952B51B66EC097BD |