Easdale Island. Argyllshire. Easdale Slate quarry in 'Black Slate Group'. The working face. The photograph shows a working crane and a narrow gauge railway with a truck. Note the precarious ladder used by the quarrymen. The cleavage dips steeply from left to right, and the bedding is almost indistinguishable (the working faces are mainly cleavage planes, the wrinkling on the latter being due to an incipient strain-slip cleavage). The 'Easdale Slates' are a dark blue-grey colour and can become slightly 'browned' by superficial weathering. The slates usually contain scattered crystals of iron pyrites, the 'diamonds' of the quarrymen. Photo P000012. Reproduced with the permission of the British Geological Survey ©NERC. All rights Reserved.
This photograph is by carnkie and was uploaded December 11th 2009. © carnkie please do not copy or distribute without prior express permission.
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