File:Ham Rock (balanced rock), Entrada Sandstone (Middle Jurassic), central Arches National Park, eastern Utah 2.jpg
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![File:Ham Rock (balanced rock), Entrada Sandstone (Middle Jurassic), central Arches National Park, eastern Utah 2.jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/4/40/Ham_Rock_%28balanced_rock%29%2C_Entrada_Sandstone_%28Middle_Jurassic%29%2C_central_Arches_National_Park%2C_eastern_Utah_2.jpg/800px-Ham_Rock_%28balanced_rock%29%2C_Entrada_Sandstone_%28Middle_Jurassic%29%2C_central_Arches_National_Park%2C_eastern_Utah_2.jpg?20230228184426)
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[edit]DescriptionHam Rock (balanced rock), Entrada Sandstone (Middle Jurassic), central Arches National Park, eastern Utah 2.jpg |
English: In addition to natural arches and blind arches, eastern Utah's Arches National Park has a relative abundance of balanced rocks. Balanced rocks are large rock masses supported by a relatively narrow pedestal. They form by differential weathering and differential erosion of hard and soft rocks.
Arches National Park's balanced rocks are developed in the Entrada Sandstone (Middle Jurassic), which is entirely composed of siliciclastics stained red by abundant hematite (= iron oxide, Fe2O3). Many of the balanced rocks consist of relatively hard, massive Slickrock Member sandstones supported by a pedestal of relatively soft siltstones and fine-grained sandstones having contorted & wavy bedding (= Dewey Bridge Member). |
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Source | https://www.flickr.com/photos/47445767@N05/8471449462/ |
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@N05/8471449462. It was reviewed on 28 February 2023 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
28 February 2023
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current | 18:44, 28 February 2023 | ![]() | 3,008 × 2,000 (2.47 MB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/8471449462/ with UploadWizard |
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Camera manufacturer | NIKON CORPORATION |
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Camera model | NIKON D70s |
Exposure time | 1/800 sec (0.00125) |
F-number | f/11 |
ISO speed rating | 1,600 |
Date and time of data generation | 19:07, 7 September 2007 |
Lens focal length | 200 mm |
Orientation | Normal |
Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
Software used | Ver.1.00 |
File change date and time | 19:07, 7 September 2007 |
Exposure Program | Not defined |
Exif version | 2.21 |
Date and time of digitizing | 19:07, 7 September 2007 |
Image compression mode | 4 |
APEX exposure bias | 0 |
Maximum land aperture | 5 APEX (f/5.66) |
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 |
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 | Landscape |
Scene control | Low gain up |
Contrast | Normal |
Saturation | Normal |
Sharpness | Hard |
Subject distance range | Unknown |