Rock 365 : Day 310 : Precambrian-Cambrian Unconformity


Day 310 : Running a field course in Ercall Quarries, Shropshire,
England for the third time in two weeks. This is the unconformity
(nonconformity) between the Late Precambrian (~560Ma) Ercall
Granophyre showing weathering at its upper surface and the breccia
facies of the (~535Ma) Lower Cambrian Wrekin Quartzite.


~ by hypocentre on November 7, 2010.

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