File:Pumice Desert (north of Crater Lake Caldera, Oregon, USA) 13.jpg
Original file (4,288 × 2,848 pixels, file size: 6.24 MB, MIME type: image/jpeg)
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Summary
[edit]DescriptionPumice Desert (north of Crater Lake Caldera, Oregon, USA) 13.jpg |
English: Pumice in the Holocene of Oregon, USA.
Crater Lake is a large, deep, freshwater lake in the Cascade Range of America's Pacific Northwest. It formed about 7,700 years ago when an ancient volcano called Mt. Mazama had an enormous explosive ash eruption. The eruption was followed by collapse of the mountain, leaving a large depression which later filled with water. Large holes or depressions formed when a volcano destroys itself or collapses are called calderas. Crater Lake Caldera in Oregon is a world-class example of this type of volcanic feature. Shown above is a closeup of the land surface at Pumice Desert, a barren landscape about 6 miles north of Crater Lake Caldera. The site has a significant deposit of pumice - it is over 100 feet thick. The material fills a pre-existing glacial valley and was delivered via a large pyroclastic flow (ash & pumice flow) during Mazama's 7.7 ka eruption. Pyroclasts include light-colored rhyodacite pumice and darker-colored basaltic andesite scoria. Age: early Holocene (~7550 to 7760 years ago) Locality: Pumice Desert, next to a roadside pullout, ~6 miles north of Crater Lake Caldera, Crater Lake National Park, southwestern Oregon, USA |
Date | |
Source | https://www.flickr.com/photos/47445767@N05/40840776015/ |
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@N05/40840776015. It was reviewed on 22 October 2020 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
22 October 2020
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 19:04, 22 October 2020 | 4,288 × 2,848 (6.24 MB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/40840776015/ with UploadWizard |
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Metadata
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Camera manufacturer | NIKON CORPORATION |
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Camera model | NIKON D90 |
Exposure time | 1/800 sec (0.00125) |
F-number | f/7.1 |
ISO speed rating | 320 |
Date and time of data generation | 15:32, 4 August 2012 |
Lens focal length | 200 mm |
Width | 4,288 px |
Height | 2,848 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 13.0 (Macintosh) |
File change date and time | 11:35, 27 April 2018 |
Y and C positioning | Co-sited |
Exposure Program | Not defined |
Exif version | 2.21 |
Date and time of digitizing | 15:32, 4 August 2012 |
Meaning of each component |
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Image compression mode | 4 |
APEX shutter speed | 9.643856 |
APEX aperture | 5.655638 |
APEX exposure bias | 0 |
Maximum land aperture | 5.3 APEX (f/6.28) |
Metering mode | Pattern |
Light source | Unknown |
Flash | Flash did not fire, auto mode |
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 | 300 mm |
Scene capture type | Standard |
Scene control | None |
Contrast | Normal |
Saturation | Normal |
Sharpness | Normal |
Subject distance range | Unknown |
GPS tag version | 2.2.0.0 |
Serial number of camera | 3562538 |
Lens used | 18.0-270.0 mm f/3.5-6.3 |
Date metadata was last modified | 07:35, 27 April 2018 |
Unique ID of original document | 80C76869E714BFE15E54ABB5BB396533 |
IIM version | 29,735 |