File:P521383.jpg: Revision history

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30 March 2015

  • curprev 20:2120:21, 30 March 2015‎ Scotfot talk contribs‎ 4,270 bytes +4,270‎ Rock specimen of augite andesite tuff. Bail Hill anticline, 2.5 miles north-west of Sanquar, Dumfriesshire, Scotland. This sample is a complex mixed volcanic rock containing fragments of a fine-grained basic igneous rock (like basalt) within a porphyri...
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