File:A16PSR Figure 6-61 Geologic map of North Ray crater.jpg
![File:A16PSR Figure 6-61 Geologic map of North Ray crater.jpg](http://upload.wikimedia.org/wikipedia/commons/thumb/6/67/A16PSR_Figure_6-61_Geologic_map_of_North_Ray_crater.jpg/382px-A16PSR_Figure_6-61_Geologic_map_of_North_Ray_crater.jpg)
Original file (472 × 740 pixels, file size: 82 KB, MIME type: image/jpeg)
![]() | This is a file from the Wikimedia Commons. Information from its description page there is shown below. Commons is a freely licensed media file repository. You can help. |
Summary
DescriptionA16PSR Figure 6-61 Geologic map of North Ray crater.jpg |
English: This is Figure 6-61 of the Apollo 16 Preliminary Science Report (NASA SP-315): Geologic map of North Ray crater. Station 11. Edited slightly. The text of the Report referring to the figure follows: The geology of the materials exposed in the walls of North Ray Crater, at this early stage of investigation, is interpreted to be a grossly layered sequence of breccias exposed only in the east wall and largely obscured elsewhere by recently active debris slides (figs. 6-60 and 6-61). Beneath 20 to 30 m of rim-flap debris, the "upper layer," which is approximately 70 m thick, is predominantly white-matrix breccias with some mixed dark rocks. The more coherent materials form discontinuous rows or benches, indicating sublayering at 5 to 10 m intervals. The absence of blocks on the west wall and the heavy concentration on the east wall and in the ejecta extending up Smoky Mountain are suggestive of a steeply dipping discontinuity between the east and west sides of the crater that separates two major units. These asymmetrical relations also can be explained as lenticular variations in induration within the same rock unit. A low-angle impact by the projectile that formed North Ray Crater is not likely because it would not explain the asymmetry of large-rock distribution in the crater walls nor the radial symmetry of the main ejecta blanket on the crater rim. The next underlying unit is a light-colored slope of possibly unconsolidated material approximately 100 m thick. The rugged floor mound is a dark, rubbly material that may be represented by House and Shadow Rocks, which were sampled on the ejecta blanket. The large size (25 m) and the angularity of House Rock reflect the strength, or coherence, and the wide spacing of joints of the rock mass from which it was derived. In terrestrial analogs such as Meteor Crater, Arizona, the largest blocks on the crater rim reflect the more coherent and thicker-bedded rock units penetrated, regardless of depth. Therefore, because House Rock is similar both in size and appearance to the coarse, dark rubble forming the crater floor and because it and Shadow Rock are very similar in composition but represent the least abundant rock type on North Ray Crater rim, they are interpreted as coming from a stratigraphic horizon exposed in the deepest part of the crater. |
Date | |
Source | Apollo 16 Preliminary Science Report (NASA SP-315), 1972 |
Author | NASA |
Licensing
Public domainPublic domainfalsefalse |
![]() |
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.) | ![]() |
![]() |
Warnings:
|
Captions
Items portrayed in this file
depicts
1972
image/jpeg
23ab19785a0172961f739376d461823b9d8e9282
83,815 byte
740 pixel
472 pixel
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 18:04, 23 January 2022 | ![]() | 472 × 740 (82 KB) | Jstuby | Uploaded a work by NASA from ''Apollo 16 Preliminary Science Report'' (NASA SP-315), 1972 with UploadWizard |
File usage
Metadata
This file contains additional information, probably added from the digital camera or scanner used to create or digitize it.
If the file has been modified from its original state, some details may not fully reflect the modified file.
JPEG file comment | Created with GIMP |
---|