Monday, 16 March 2009

Extension idea for A Valley in 30 seconds

Last year we published an Earthlearningidea called 'A valley in 30 seconds - pulling rocks apart'. We have now added an extension idea which makes the tension fault even more clear and more precise.
It is important to know about these faults as they explain why a rock layer like a coal seam in a mine, may suddenly stop only to be discovered higher or lower on the other side of the fracture in the strata.

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