Lots of broken areas - spot the shear plane...the shale layers were utilised & the competent sandstone broken up http://pic.twitter.com/sbFV13xl2w
— Geology at Greenhead (@Geol_Greenhead) October 25, 2017
via Twitter https://twitter.com/Geol_Greenhead
October 26, 2017 at 01:07AM
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