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You are browsing the archive for 23 February 2012 - Mountain Beltway.

23 February 2012

Contorted fractures in the Contorted Bed

Today, let’s zoom in on a little something I saw at the outcrop of the Contorted Bed in downtown Johannesburg, South Africa: What are these things? I only saw them at this one spot. These look to me like en echelon fractures at a high angle to bedding, that were then deformed due to dextral (top to the right) shearing. But they’re really closely spaced, and they show no apparent …



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