Template:POTD/2007-03-19
Picture of the day archives
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2007 March
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2007 March 18
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Picture of the day
The
Richat Structure
is a
depression
in the country of
Mauritania
, almost 50 km (30 mi) across. It was originally thought to be the impact of a
meteorite
. Now it is thought to be a symmetrical
uplift
(circular
anticline
or dome) that has been exposed to
erosion
. In this
false-color
photo,
bedrock
is brown, sand is yellow and white, vegetation is green, and salty
sediments
are blue.
Photo credit:
Landsat 7
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