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To: cuban leaf

The graded bank tends to assume it’s angle of repose.


3 posted on 03/24/2014 1:09:49 PM PDT by bert ((K.E. N.P. N.C. +12 ..... History is a process, not an event)
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To: bert

Yeah. It hints at why valleys are deeper and sides more sheer on Mars.


6 posted on 03/24/2014 1:11:16 PM PDT by cuban leaf
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