The Student's Handbook of Physical Geology

acid action agencies alumina amount anticlinal augite basalt beds blocks bottom calcareous calcite called Cañon carbonate of lime carbonic acid chalk channel chemical clay cleavage cliffs coast colour consists contain coral cracks crystalline crystals débris denudation deposits depth described detrition distance district dolerite dykes earth edition elevation erosion excavated fault feet felspar fissures formation formed Geol Geology glacier glauconite gneiss gradually granite greensand ground hills horizontal hornblende igneous rocks instance iron island Jukes lakes land lava layers limestone magnesia mass material metamorphic mica miles mineral mountain occur original Orthoclase particles pebbles planes porphyritic portion Portrait pressure produced quartz rain result ridge rise river sand sandstone schist shale shells shore side siliceous slope soil solution sometimes stones strata stratum stream structure surface thickness tion tract Trans traversed unconformity valley velocity vertical volcanic