File:Finsch crater AS17-P-2335.jpg
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Summary
editDescriptionFinsch crater AS17-P-2335.jpg |
English: Oblique view facing north of Finsch crater in Mare Serenitatis, the moon. This image is based on to Figure 242 of Apollo Over the Moon: A View from Orbit (NASA SP-362), which has the following caption: This picture, showing an area in central Mare Serenitatis 200 km from the nearest outcrops of terra rocks, is an oblique view of a 4-km diameter crater form about 200 m deep. The crater floor is similar to the surface of the surrounding mare, which is presumably mare basalt covered by 3 to 6 m of regolith. The rim of the crater is raised, although subdued; from this we infer that the present form was developed when mare lava flooded a normal impact crater that had formed on a lower, preexisting surface. The flooding basalt then subsided, more or less in proportion to its thickness, which was greatest inside the crater. The subsidence may have resulted from escape of bubbles from the lava while it was soft, thermal contraction of the lava, and compaction of an underlying relatively loosely packed regolith. Regolith compaction may have occurred when the load and heat of the flooding lava crushed irregular fragments of regolith into more compact shapes and plastically deformed the glassy components of the regolith into more compact shapes or into voids between other particles. |
Date | |
Source |
Arizona State University, Apollo Image Archive, Apollo Browse Gallery, Apollo 17 Panoramic Camera AS17-P-2335 |
Author | NASA |
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This image or video was catalogued by one of the centers of the United States National Aeronautics and Space Administration (NASA) under Photo ID: AS17-P-2335. This tag does not indicate the copyright status of the attached work. A normal copyright tag is still required. See Commons:Licensing. Other languages:
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Licensing
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This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.) | ![]() |
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JPEG file comment | This is a virtual print of Apollo Photograph AS17-P-2335 generated by the School of Earth and Space Exploration, Arizona State University. Usage of this image is governed by the Acceptable Use Policy, which can be accessed at http://apollo.sese.asu.edu/ABOUT_SCANS/index.html |
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