multiple layers different rock materials |
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| navigate by keyword : wood wall trunk stonewall soil ruins rock iron geology formation food flooring floor carving brickwork brick boulder botryoidal boudinage breccia chilled margin cross bedding cumulate gneiss granulite imbricate limestone migmatite prophyroclast vesicular claystone conglomerate cleavage sedimentary rocks strata stretching lineation tuffaceous sandstone |
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| The Earth's crust constantly reveals its history, its changes, its stresses one only has to observe it carefully to discover extraordinary things! |
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