Quote:
Originally Posted by JonClarke
This is a most interesting feature.
It is definitely a hole, walled by bedrock and very steep sided. There is no rim as such and it appears completely separate from Victoria crater in both MOC and rover imager.
The bedrock forms the faint white ring in the MOC image. We can't see the floor in the rover image but presumably is floored by the usual dark sand, making the dark spot in the MOC image.
The most interesting feature for me is the fact that the hole appears younger than the dune on the rim of Victoria crater. The dune is truncated by the hole, showing a near vertical section through the dune. The fact that the dune material support such a near vertical surface shows that the dune is very cohesive, perhaps indurated. The internal structure of the dune is clearly visible.
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Jon
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Yes, the hole looks outrageously deep and steep when you look at the stereo image with 3-D glasses!
Layers of 'Cabo Frio' in 'Victoria Crater' (Stereo)
"This view of "Victoria crater" is looking southeast from "Duck Bay" towards the dramatic promontory called "Cabo Frio." The small crater in the right foreground, informally known as "Sputnik", is about 20 meters (about 65 feet) away from the rover, the tip of the spectacular, layered, Cabo Frio promontory itself is about 200 meters (about 650 feet) away from the rover, and the exposed rock layers are about 15 meters (about 50 feet) tall. This is a red-blue stereo anaglyph generated from images taken by the panoramic camera (Pancam) on NASA's Mars Exploration Rover Opportunity during the rover's 952nd sol, or Martian day, (Sept. 28, 2006) using the camera's 430-nanometer filters."
http://marsrovers.nasa.gov/gallery/p...88_L7R1ana.jpg
Bob Clark