Includes bibliographical references (pages 161-199) and index.
Contents:
Catastrophism versus gradualism -- Lyell's laws -- The Alvarez hypothesis -- Mass extinctions -- Kill curves and Strangelove oceans -- Catastrophism and natural selection : Charles Darwin versus Patrick Matthew -- Impacts and extinctions : do they match up? -- The great dying : the end-Permian extinctions -- Catastrophic volcanic eruptions and extinctions -- Ancient glaciers or impact-related deposits? -- The Shiva hypothesis : comet showers and the galactic carousel -- Geological upheavals and dark matter -- Epilogue: What does it all mean? : a new geology.
This resource is supported by the Institute of Museum and Library Services under the provisions of the Library Services and Technology Act as administered by State Library of Iowa.