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To: dr_lew

In sedimentary rock, the age of the deposition is what provides the time frame of the rock formation.


63 posted on 10/17/2013 11:04:20 PM PDT by stormer
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To: stormer

“Rock formation” is an ambiguous term in this context. You pick up a rock ... when was it formed? The geologists answer is the date of the agglomeration of the material of the rock, yet in common terms, a “rock formation” refers to the apparent configuration of the constituent rocks, however ancient their “formation” may have been.

So, we’re involved in a purely rhetorical exercise. If that rock was 200 million years old, it was still 200 million years old after it was tipped over.


66 posted on 10/17/2013 11:25:13 PM PDT by dr_lew
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