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Space/Science » in reply to The Bonneville Monster Pan

re: The Bonneville Monster Pan
Robert Clark — (archived)

Nice work. A couple of points. You can see in your version and Doug's version below there are scattered dark areas in the sand covered portion at the bottom of the crater. They don't look like they are just rocks. What are they?
Secondly, there is visible a crater with a smaller crater next to it at the base of Bonneville in your image. I don't see it in Doug's image; perhaps his pan didn't go that far.
I wonder if the larger crater is in fact a maar, which is due to volcano, liquid water interaction. We discussed before that maars usually have rounded or flattened rims as is the case with this crater within Bonneville. In fact the smaller crater next to it could also be a tuff ring:

See the images here:

HYDROVOLCANIC VENTS: Maars and Tuff Rings
http://www.geology.sdsu.edu/how_volcanoes_work/Hydrovolcanic.html

Bob Clark

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