The Student's Handbook of Physical Geology

accumulated action altered amount angles appear become beds blocks bottom called carbonate carried cause chemical clay cliffs coal coast colour consist containing continued course cracks crust crystalline crystals deposits depth described direction distance district earth effect elevation erosion exist extent fact fall fault feet felspar force formation formed fragments frequently Geology gradually granite greater ground hard hills igneous rocks increase instance iron island joints kind known lake land lava less lime limestone lower mass material matter means metamorphic miles mineral mountain nature observed occur origin planes portion present pressure probably produced rain remains result river rocks sand sandstone seen shale shore side silicate similar slope solid solution sometimes stone stream structure surface term thickness tion usually valley varieties vertical volcanic whole