File:AS10-28-4012 (46570117085).jpg

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AS10-28-4012. Necho crater.
This photo was used in Figure 2-14 of Analysis of Apollo 10 Photography and Visual Observations (NASA SP-232, 1971), which has the following caption:

Fresh unnamed crater 35 km in diameter located approximately 122° E, 5° S (AS10-28-4012).

The text of this document refers to the figure as follows:

Several striking features of the unusual lunar crater in figure 2-14 are the blocks on the rim crest, the crater interior, and the outer rim slopes. Boulders apparently have rolled a short distance down the outer rim slope. Boulder tracks, if such tracks exist, are exceedingly faint. The two debris flows on the far rim of the crater are more apparent. The upper flow begins at the top of the large uppermost terrace and continues down across a series of smaller terraces approximately three-fourths of the depth of the crater. The second flow, which begins on the level at which the first flow ends, extends to the bottom of the crater and ends near the low jumble of material that comprises the central peak complex. The upper flow probably was triggered by a rockfall from the steep upper rim slope and initiated the lower flow farther down the inner slope.
The large-scale en-bloc terracing of the inner rims of large lunar craters has long been apparent from terrestrially based telescopic observation. The example of this feature (fig. 2-14) is unusual because one end of the large upper terrace has not yet broken free of the upper crater rim. Although the upper surface tilts toward the crater center with increasing proximity to the free end, this terrace appears to be one coherent faulted slice or slump block. The smaller arcuate slump blocks below this terrace all appear to be less cohesive. To the left of the major slump zone, few deposits bear any trace of the preslump configurations.
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Source AS10-28-4012
Author Project Apollo Archive
This image or video was catalogued by Johnson Space Center of the United States National Aeronautics and Space Administration (NASA) under Photo ID: AS10-28-4012.

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This image was originally posted to Flickr by Apollo Image Gallery at https://flickr.com/photos/136485307@N06/46570117085 (archive). It was reviewed on 18 June 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the Public Domain Mark.

18 June 2019

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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current03:09, 18 June 2019Thumbnail for version as of 03:09, 18 June 20194,400 × 4,600 (1.14 MB)Tm (talk | contribs)Transferred from Flickr via #flickr2commons

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