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(previous picture) 22a. Limestone erratic lying on the limestone pavement of The Burren, County Clare, Ireland. In the background is the famous Poulnabrone prehistoric portal dolmen made of limestone slabs. (next picture) START or INDEX
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Geology-rocks-minerals geological topographical landscape scenes physical geography, types of rock formations - igneous granite basalt, metamorphic slate and sedimentary rocks limestone sandstone shale, rock strata