Group: rec.music.progressive · Group Profile · Search for Duration of evolution in rec.music.progressive
Author: Pahu
Date: Nov 9, 2007 12:24
...no worldwide or even continental unconformity exists in Earth's sedimentary layers, those layers must have been deposited rapidly. (An unconformity represents a time break of unknown duration- for example, an erosional surface between two adjacent strata.) Parallel layers (called conformities) imply continuous, relatively rapid deposition. Because unconformities are simply local phenomena (a...
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