File:Slate (Knife Lake Formation, metamorphism at 2.7 Ga, Neoarchean; Rt. 135 roadcut, Gilbert, Minnesota, USA) 11 (23139943949).jpg
![File:Slate (Knife Lake Formation, metamorphism at 2.7 Ga, Neoarchean; Rt. 135 roadcut, Gilbert, Minnesota, USA) 11 (23139943949).jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/5/54/Slate_%28Knife_Lake_Formation%2C_metamorphism_at_2.7_Ga%2C_Neoarchean%3B_Rt._135_roadcut%2C_Gilbert%2C_Minnesota%2C_USA%29_11_%2823139943949%29.jpg/635px-Slate_%28Knife_Lake_Formation%2C_metamorphism_at_2.7_Ga%2C_Neoarchean%3B_Rt._135_roadcut%2C_Gilbert%2C_Minnesota%2C_USA%29_11_%2823139943949%29.jpg?20191205055312)
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[edit]DescriptionSlate (Knife Lake Formation, metamorphism at 2.7 Ga, Neoarchean; Rt. 135 roadcut, Gilbert, Minnesota, USA) 11 (23139943949).jpg |
Slate in the Precambrian of Minnesota, USA. This is an outcrop of slate, a foliated metamorphic rock composed of clay minerals. Slate is the product of low-grade metamorphism of shale. The original shale bedding is visible in slate samples at this locality. Stratigraphy: Knife Lake Formation, metamorphism at 2.7 Ga (Neoarchean) Locality: roadcut on the northern side of Rt. 135 at the Gilbert city limits sign, just west of the town of Gilbert & southeast of the town of Virginia, central St. Louis County, northeastern Minnesota, USA (47° 29' 34.17" North latitude, 92° 29' 24.27" West longitude) |
Date | |
Source | Slate (Knife Lake Formation, metamorphism at 2.7 Ga, Neoarchean; Rt. 135 roadcut, Gilbert, Minnesota, USA) 11 |
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@N05/23139943949 (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 | 05:53, 5 December 2019 | ![]() | 3,178 × 3,000 (3.19 MB) | Ser Amantio di Nicolao (talk | contribs) | Transferred from Flickr via #flickr2commons |
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Camera manufacturer | Canon |
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Camera model | Canon PowerShot D10 |
Exposure time | 1/250 sec (0.004) |
F-number | f/4 |
ISO speed rating | 80 |
Date and time of data generation | 16:56, 10 June 2015 |
Lens focal length | 11.614 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 | 23:03, 3 December 2015 |
Y and C positioning | Co-sited |
Exif version | 2.21 |
Date and time of digitizing | 16:56, 10 June 2015 |
Meaning of each component |
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Image compression mode | 3 |
APEX shutter speed | 7.96875 |
APEX aperture | 4 |
APEX exposure bias | −0.33333333333333 |
Maximum land aperture | 4 APEX (f/4) |
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 | Landscape |
Lens used | 6.2-18.6 mm |
Date metadata was last modified | 16:03, 3 December 2015 |
Unique ID of original document | 17A2E8A62088BCF48716EE2A25BC9209 |
IIM version | 29,285 |