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24 December 2010

GoSF6: Graywacke turbidites

The geological tour of San Francisco continues with an examination of the graywacke deposits of the


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Friday fold: Mars Hill terrane

Today’s Friday Fold comes to us via Pete Berquist of Thomas Nelson Community College in Hampton, Virginia. Check it out: Pete explains what’s going on here: I cannot provide an exact location but this is within the Mars Hill Terrane (MHT), which is an distinctive swath of Mesoproterzoic basement extending ~50 km x 100 km within the North Carolina Blue Ridge. It may be analogous with the Stage Road Gneiss …


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