Earth in Upheaval

Africa Agassiz Ages in Chaos Alaska Alps America ancient Arctic ashes astronomical beds bones bottom Bronze Age catastrophes cause caves century changes climate coal coast comets continents crater crust Darwin deposits drift dust earth earthquakes elephants epoch erratic boulders eruption Europe evidence evolution explain extinct animals fauna feet thick fissures forests formation formed fossils genera geologists George McCready Price glacial period glaciers globe ground Himalayas hippopotamus human hundred Ibid Ice Age Ice Age theory ice cover islands Lake Lake Lahontan land latitudes lava Lyell magnetic field mammoths marine mass melting meteorites Middle Kingdom miles Minoan moon mountains mutations natural selection Neolithic North northern observed ocean Origin of Species past plants Pleistocene polar poles present radiocarbon recent regions Rhone Glacier Rift River rocks sand sediment Siberia solar South southern stone strata sudden surface tidal tion trees upheavals valleys volcanic Worlds in Collision wrote