G00dfella4024 Posted July 2, 2021 Share Posted July 2, 2021 What do you think. Found in James river. Central Virginia Link to comment Share on other sites More sharing options...
doushantuo Posted July 2, 2021 Share Posted July 2, 2021 (edited) edit:adding 2nd picture Edited July 2, 2021 by doushantuo 2 Link to comment Share on other sites More sharing options...
hemipristis Posted July 2, 2021 Share Posted July 2, 2021 hello, what you have is a rock (sandstone, I think---pixelation issue) that has fractures with secondary quartz infill. That is to say when the rock was "in position", it was fractured, and silica-rich water flowed through the cracks, slowly precipitating out as quartz crystals that eventually filled in the cracks 2 1 'Those who cannot remember the past are condemned to repeat it.' George Santayana Link to comment Share on other sites More sharing options...
Ludwigia Posted July 2, 2021 Share Posted July 2, 2021 I agree with hemipristis. So it's not a concretion in the traditional sense. Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
doushantuo Posted July 3, 2021 Share Posted July 3, 2021 (edited) proceeding from the point of view of Hemipristis: directly below :brecciated fault core lowermost: deformation bands,Aztec sandstone Edited July 3, 2021 by doushantuo 1 Link to comment Share on other sites More sharing options...
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