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vio1_v_bw_o_TPMBK (A76-1011-1-31)

“Fine detail in the interior of a Martian crater can be seen in this photo taken by Viking 1 of an area near a possible landing site for Viking 2. The crater (on the left margin of the photo) is about 40 kilometers (25 miles) in diameter, and shows many features found in lunar craters. The central portion is crossed by numerous cracks. Similar features are seen at the huge lunar impact basin, Orientale. Their origin is unknown, but it has been suggested that the cracks were formed either by consolidation of lava that filled the crater after it formed or by fallback from the impact process. Alternatively, the cracks may have formed long after the impact event by uplift of the crater floor. Between the cracked terrain and the crater rim is a region of chaotic debris. Beyond the rim there is no evidence of an ejecta blanket – that rock material which is blasted from the crater by the shock of the impacting meteorite. The ejecta blanket is presumably covered by later deposits.”

 

Disappointingly, the only place I found the image, as ‘Figure 21’:

 

what-when-how.com/space-science-and-technology/mars/

Credit: ‘what-when-how: In Depth Tutorials and Information’ website

 

Featured on the cover of “NASA Activities”, Vol. 7, No. 8, August 1976.

 

Incredibly, I found the crater, it apparently/possibly being nameless, located ~45 kilometers north (at its nearest point) of Ganges Chasma, immediately southwest of Kāid Crater. Readily identifiable in the following image, toward the upper border, a little to the right of center:

 

upload.wikimedia.org/wikipedia/commons/b/b8/Ganges_Chasma...

Credit: Wikimedia

 

As if that wasn’t enough, check this out. I still got it…occasionally:

 

viewer.mars.asu.edu//planetview/inst/themis/V18612002#P=V...

 

image.mars.asu.edu/convert/V18612002.jpeg?image=/mars/rea...

Credit: ‘Arizona State University/School of Earth & Space Exploration/Mars Image Explorer’ website

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Uploaded on October 2, 2021