Quote:
Originally Posted by BRPORSCHE
Sammy, what is that? Sure looks like an ancient volcano. They are all over west Texas. The cone which is sedimentary rock has long since weathered away while the more weather resistwnt igneaous rock which would have formed by the cooling magma has remained. I bet that is some typ of basalt.
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His post... it's Shiprock. Search.
https://en.wikipedia.org/wiki/Shiprock,_New_Mexico