File:Spheroidal weathering (Butte Quartz Monzonite, Late Cretaceous, 76 Ma; north of Butte, Montana, USA) 1.jpg
Original file (3,008 × 1,598 pixels, file size: 5.49 MB, MIME type: image/jpeg)
Captions
Summary
[edit]DescriptionSpheroidal weathering (Butte Quartz Monzonite, Late Cretaceous, 76 Ma; north of Butte, Montana, USA) 1.jpg |
English: Quartz monzonite in the Cretaceous of Montana, USA.
Spheroidal weathering, also known as exfoliation, results in the corners and sharp edges of rock masses being rounded. It tends to occur at outcrops of intrusive igneous rocks (e.g., the exfoliation domes in the Yosemite Valley area, California, USA) and some massive sandstones (e.g., Arches National Park, Utah, USA). Seen here is spheroidally weathered quartz monzonite near Butte, Montana. The rocks in the area have been richly mineralized with copper sulfides and other metallic minerals. Geologic unit: Butte Quartz Monzonite, Campanian Stage, late Late Cretaceous, 76 Ma Locality: boulders between Moulton Reservoir Road and Yankee Doodle Tailings Pond, north of the town of Butte, northern Silver Bow County, western Montana, USA |
Date | |
Source | https://www.flickr.com/photos/47445767@N05/50973362588/ |
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@N05/50973362588. It was reviewed on 24 February 2021 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
24 February 2021
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 14:59, 24 February 2021 | 3,008 × 1,598 (5.49 MB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/50973362588/ with UploadWizard |
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Metadata
This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
Camera manufacturer | NIKON CORPORATION |
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Camera model | NIKON D70s |
Exposure time | 1/125 sec (0.008) |
F-number | f/9 |
ISO speed rating | 400 |
Date and time of data generation | 17:38, 9 August 2010 |
Lens focal length | 18 mm |
Width | 3,008 px |
Height | 2,000 px |
Bits per component |
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Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
Software used | Adobe Photoshop Elements 18.0 (Macintosh) |
File change date and time | 14:11, 23 February 2021 |
Y and C positioning | Co-sited |
Exposure Program | Not defined |
Exif version | 2.21 |
Date and time of digitizing | 17:38, 9 August 2010 |
Meaning of each component |
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Image compression mode | 4 |
APEX shutter speed | 6.965784 |
APEX aperture | 6.33985 |
APEX exposure bias | 0 |
Maximum land aperture | 3.6 APEX (f/3.48) |
Metering mode | Pattern |
Light source | Unknown |
Flash | Flash did not fire, compulsory flash suppression |
DateTime subseconds | 00 |
DateTimeOriginal subseconds | 00 |
DateTimeDigitized subseconds | 00 |
Supported Flashpix version | 1 |
Color space | sRGB |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Scene type | A directly photographed image |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Focal length in 35 mm film | 27 mm |
Scene capture type | Landscape |
Scene control | None |
Contrast | Normal |
Saturation | Normal |
Sharpness | Hard |
Subject distance range | Unknown |
Serial number of camera | 200638ad |
Lens used | 18.0-200.0 mm f/3.5-5.6 |
Date metadata was last modified | 09:11, 23 February 2021 |
Unique ID of original document | 4572EE56B029DEC815C07D73D36E2575 |