Ager, Derek The new catastrophism : the importance of the rare event in geological history / Derek Ager - Cambridge : The University Press, 1995 - xx, 231 p. : ill. ; 26 cm. Includes bibliographical references and index ISBN: 0521483581 : USD 13.95 Subjects--Topical Terms: Catastrophes (Geology) Dewey Class. No.: 550.9