File:Porphyritic granite (pgpm2 facies, Pikes Peak Batholith, Mesoproterozoic, 1.08 GA; Pikes Peak, Colorado, USA) 1.jpg
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Summary
[edit]DescriptionPorphyritic granite (pgpm2 facies, Pikes Peak Batholith, Mesoproterozoic, 1.08 GA; Pikes Peak, Colorado, USA) 1.jpg |
English: Porphyritic granite from the Precambrian of Colorado, USA. (~4.7 centimeters across at its widest)
One of the most visited mountain peaks in the American Cordillera is central Colorado’s Pikes Peak. The rocks of this mountain & surrounding area represent the Pikes Peak Batholith, a fairly large, Precambrian-aged igneous intrusion that was emplaced 1.08 billion years ago. Published research on the Pikes Peak Batholith has shown that several igneous facies are present (e.g., Hutchinson, 1987). This sample is a coarsely-crystalline porphyritic granite with quartz, potassium feldspar, and biotite mica. Geologic unit: pgpm2 facies, Pikes Peak Batholith, late Mesoproterozoic, 1.08 Ga Locality: loose piece from just east of summit house atop Pikes Peak, west of the town of Colorado Springs, western El Paso County, central Colorado, USA (38° 50’ 29” North latitude, 105° 02’ 29” West longitude) Reference cited: Hutchinson, R.M. 1987. Granite-tectonics of the Pikes Peak intrusive center of Pikes Peak composite batholith, Colorado. Geological Society of America Centennial Field Guide 2: 331-334. |
Date | |
Source | https://www.flickr.com/photos/47445767@N05/30903201603/ |
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@N05/30903201603 (archive). It was reviewed on 24 December 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
24 December 2019
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current | 20:27, 24 December 2019 | 2,021 × 2,073 (2.7 MB) | Ser Amantio di Nicolao (talk | contribs) | User created page with UploadWizard |
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Camera manufacturer | Canon |
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Camera model | Canon PowerShot D10 |
Exposure time | 1/60 sec (0.016666666666667) |
F-number | f/9 |
ISO speed rating | 80 |
Date and time of data generation | 01:56, 17 December 2016 |
Lens focal length | 7.23 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 | 23:31, 17 December 2016 |
Y and C positioning | Co-sited |
Exif version | 2.21 |
Date and time of digitizing | 01:56, 17 December 2016 |
Meaning of each component |
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Image compression mode | 3 |
APEX shutter speed | 5.90625 |
APEX aperture | 6.34375 |
APEX exposure bias | −1 |
Maximum land aperture | 3.34375 APEX (f/3.19) |
Metering mode | Pattern |
Flash | Flash fired, compulsory flash firing, red-eye reduction mode |
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 | 18:31, 17 December 2016 |
Unique ID of original document | 72DE1AF4B6022A9844101DA2D184C982 |