Monday, February 25, 2013

Unconformity


Just west of Baker's Bridge, One may view the contact between the Precambrian Baker's Bridge Granite and the overlying Upper Devonian Elbert Formation. The contact between these two rock types exhibits a gap of time known as an uncomformity which here represents 1.2 to 1.3 Billion years missing from the geological record of the area. During this lost time, it is believed there was no sediment deposition and erosion reigned supreme. Below is an annotated picture of the same outcrop.


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