File:AS15-M-1541.png

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Captions

Captions

Archimedes crater in Mare Imbrium

Summary[edit]

Description
English: This photo was used in Figure 179 of Apollo Over the Moon: A View from Orbit (NASA SP-362, 1978), which has the following caption:
The ejecta blanket and secondary impact craters of the mare-filled crater Archimedes (80 km in diameter) are visible on the terrain toward the viewer (south) but not on the mare surface to the crater's left and right. Yet at one time ejecta like that to the south must have completely surrounded Archimedes because similar ejecta surrounds craters such as Aristillus (upper right). Thus, the mare lavas, in addition to filling the interior of Archimedes, obviously have covered the eastern and western parts of the ejecta. In turn, ejecta from Archimedes has covered materials of the Imbrium basin like the rugged hills in the lower left of the picture. These stratigraphic relations prove that time elapsed between formation of the Imbrium basin and its filling by mare-time enough for impacts to create Archimedes, the deeply flooded crater to its right (arrow), and similar "Imbrian-age" craters elsewhere, as was pointed out by Eugene Shoemaker in 1962.
Archimedes is the first large crater described in this chapter that has no visible central peak complex. Presumably the complex exists but has been completely inundated by the mare.-D.E.W.

Photographic data:

Image Name: AS15-M-1541
Mission: Apollo 15
Revolution (Orbit): 35
Camera: Mapping/Metric
Exposure: 00:00:00
Camera Tilt: 40
Sun Elevation: 26.0°
Features: ARCHIMEDES, ARISTILLUS
Film Type: 3400
Color: black&white
Date
Source Arizona State University, Apollo Image Archive, Apollo Browse Gallery, Apollo 15: Mapping (Metric) Camera, AS15-M-1541
Author NASA
This image or video was catalogued by one of the centers of the United States National Aeronautics and Space Administration (NASA) under Photo ID: AS15-M-1541.

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Licensing[edit]

Public domain 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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