ISS018-E-11127
| NASA Photo ID | ISS018-E-11127 |
| Focal Length | 800mm |
| Date taken | 2008.12.06 |
| Time taken | 19:15:33 GMT |
Resolutions offered for this image:
1000 x 664 pixels 540 x 360 pixels 720 x 480 pixels 3072 x 2098 pixels 640 x 437 pixels
1000 x 664 pixels 540 x 360 pixels 720 x 480 pixels 3072 x 2098 pixels 640 x 437 pixels
Cloud masks available for this image:
Spacecraft nadir point: 41.3° N, 109.3° W
Photo center point: 40.1° N, 109.0° W
Photo center point by machine learning:
Photo center point: 40.1° N, 109.0° W
Photo center point by machine learning:
Nadir to Photo Center: South
Spacecraft Altitude: 186 nautical miles (344km)
Country or Geographic Name: | USA-COLORADO |
Features: | RAVEN RIDGE, MORMON GAP |
| Features Found Using Machine Learning: | |
Cloud Cover Percentage: | 10 (1-10)% |
Sun Elevation Angle: | 26° |
Sun Azimuth: | 182° |
Camera: | Nikon D2Xs Electronic Still Camera |
Focal Length: | 800mm |
Camera Tilt: | 22 degrees |
Format: | 4288E: 4288 x 2848 pixel CMOS sensor, RGBG imager color filter |
Film Exposure: | |
| Additional Information | |
| Width | Height | Annotated | Cropped | Purpose | Links |
|---|---|---|---|---|---|
| 1000 pixels | 664 pixels | No | Yes | Earth From Space collection | Download Image |
| 540 pixels | 360 pixels | Yes | Yes | Earth From Space collection | Download Image |
| 720 pixels | 480 pixels | Yes | Yes | NASA's Earth Observatory web site | Download Image |
| 3072 pixels | 2098 pixels | No | No | Download Image | |
| 640 pixels | 437 pixels | No | No | Download Image |
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Image Caption: Raven Ridge, Colorado
An important way to unravel the Earth's history is to find and study old rocks that have been turned up and exposed on the surface through the Earth's tectonic activity. At Raven Ridge (image center, left to right), which extends across the Colorado-Utah border, geologists can walk across successive layers of rock deposited approximately 54-50 million years ago during the Eocene Epoch--approximately 10-15 million years after the dinosaurs went extinct.
The sedimentary layers at Raven Ridge were originally deposited as flat-lying beds in an ancient lake known as Paleolake Uinta, and later they were tilted by tectonic forces. The tilted beds are visible in this astronaut photograph as hard, erosion-resistant ridges of tan, buff, and white rocks (freshwater limestones), with less resistant layers (mudstones and shales) forming valleys between ridges.
A prominent topographic break in the ridgeline, Mormon Gap, provides road access across the ridge. To the northwest of the gap, dark brown alluvial deposits (sand and gravel carried by moving water) extend southward from the crest of the ridge. These deposits likely cover a pediment--a flat, sloping surface of eroded bedrock that extends outward from a mountain front.
The rocks and fossils at Raven Ridge indicate that during the time when they were created, the area was covered in tropical forests that were filled with the early ancestors of modern primates, horses, and deer (among other animals).
An important way to unravel the Earth's history is to find and study old rocks that have been turned up and exposed on the surface through the Earth's tectonic activity. At Raven Ridge (image center, left to right), which extends across the Colorado-Utah border, geologists can walk across successive layers of rock deposited approximately 54-50 million years ago during the Eocene Epoch--approximately 10-15 million years after the dinosaurs went extinct.
The sedimentary layers at Raven Ridge were originally deposited as flat-lying beds in an ancient lake known as Paleolake Uinta, and later they were tilted by tectonic forces. The tilted beds are visible in this astronaut photograph as hard, erosion-resistant ridges of tan, buff, and white rocks (freshwater limestones), with less resistant layers (mudstones and shales) forming valleys between ridges.
A prominent topographic break in the ridgeline, Mormon Gap, provides road access across the ridge. To the northwest of the gap, dark brown alluvial deposits (sand and gravel carried by moving water) extend southward from the crest of the ridge. These deposits likely cover a pediment--a flat, sloping surface of eroded bedrock that extends outward from a mountain front.
The rocks and fossils at Raven Ridge indicate that during the time when they were created, the area was covered in tropical forests that were filled with the early ancestors of modern primates, horses, and deer (among other animals).
