Open-air Studies: An Introduction to Geology Out-of-doors

action already appears banks become beds blocks broken called carried central Chalk changes character chemical clay cliffs coast common complete cone contains continually course covered crystals denudation deposits direction earth edge EDITION Engineer face fact fall feet finally flow folded fossils Geology give glacier granite hills hollow Hythe Beds Illustrations iron known lake land lava layers limestone LONDON look lower marine mass material matter miles minerals mountain natural observations occur origin pass pebbles period plain Plate PRACTICAL present produced reach region remains result ridge rise river rock round salts sand seen shells side silica slope sometimes species spread stand stones strata stream structure surface upper valley volcanic walls whole wind