02184oam 2200541 450 991070865310332120170410125706.0(CKB)5470000002470695(OCoLC)889716049(EXLCZ)99547000000247069520140901d1993 ua 0engurn||||||||||txtrdacontentcrdamediacrrdacarrierComparison of the Cretaceous-Tertiary boundary impact events and the 0.77-Ma Australasian tektite event relevance to mass extinction /by E.C.T. Chao[Washington, D.C.] :United States Government Printing Office,1993.1 online resource (iv, 22 pages) illustrations, mapsU.S. Geological Survey bulletin ;2050Title from title screen (viewed August 25, 2014)."Reinterpretation of iridium anomalies, shocked quartz, and microtektites attributed to cratering events in Cretaceous-Tertiaryboundary sections. Evidence from the Ries crater of Germany and Australasian tektites is essential to understanding giant craters and mass extinction."Includes bibliographical references (pages 19-22).Comparison of the Cretaceous-Tertiary boundary impact events and the 0.77-Ma Australasian tektite event Cretaceous-Paleogene boundaryExtinction (Biology)TektiteCretaceous-Tertiary boundaryfastExtinction (Biology)fastTektitefastCretaceous-Paleogene boundary.Extinction (Biology)Tektite.Cretaceous-Tertiary boundary.Extinction (Biology)Tektite.Chao E. C. T.1400093Geological Survey (U.S.),COPCOPOCLCOOCLCFOCLCAGPOBOOK9910708653103321Comparison of the Cretaceous-Tertiary boundary impact events and the 0.77-Ma Australasian tektite event3466390UNINA