File:AS16-M-2814.png

Sculptured terrain around west side of Ptolemaeus Crater (right center). 1, large depression extending across rim and wall of Ptolemaeus; 2, trough with prominent eastern wall; 3, furrow with high rims; 4, smooth, lineated texture (north toward top).

The text of the Report describes the figure as follows:

Several topographic characteristics supporting an endogenetic origin for the larger elements of Imbrium sculpture are shown in figure 29-38. The wide, prominent depression in the upper right corner of the photograph extends across the entire rim and wall of Ptolemaeus Crater on the side nearest the Imbrium Basin. From the figure, no evidence of the rim shielding the wall against missile gouging is detectable, such as is noted in the disposition of secondary crater clusters around large, young, primary-impact craters such as Tycho Crater. In the lower right corner of the figure, one side of a large trough appears to be much higher and better defined than the other. This type of asymmetry is more suggestive of a structural origin than gouging and scoring by impact ejecta. In this photograph, as well as in several others, some of the furrows have conspicuous rims, more readily explained by high-velocity, surface-grazing impacts than by tectonism. However, similar rimmed furrows farther to the south in the vicinity of Airy and Delaunay Craters are associated with lobate, flowlike materials and may be of volcanic origin. Toward the lower left corner of figure 29-38, a continuous gradation is noted between coarse sculpture patterns and finely lineated materials, which elsewhere have been mapped as the Fra Mauro Formation. In figures 29-37 and 29-38, the absence of randomly oriented, overlapping crater clusters is in contrast to the patterns of secondary craters usually observed around large craters.

Photographic data:

Image Name: AS16-M-2814

Mission: Apollo 16

Revolution (Orbit): 60

Camera: Mapping/Metric

Exposure: 00:00:00.009

Camera Tilt: VERT

Scan Pixel Scale: 8.193

Start Time: (DOY:115) 1972-04-24T17:22:37

Spacecraft Altitude: 123.57 km

Center Coordinates (lat, lon): -10.06°,-6.48°

Corner Coordinates: -6.99°,-9.92°

-6.7°,-3.44°

-13.1°,-3.03°

-13.48°,-9.65°

Sun Elevation: 37.0°

Features: DAVY, DAVY G, DAVY Y, PALISA

Film Type: 3400

Color: black&white