158 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY 
Fig. F.— The folding 
Fig. G. — The first faulting. 
Fig. H. — The great denudation. 
1 
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V V V V V/ V V 
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^&^^=^-^' ' --• ' • •-• 
^ 
^^^ 
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Fig. I. — The first hiva How. 
