Chao, E. C. T. <br/><br/>
Comparison 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]:   [United States Government Printing Office],   [1993].  
 - iv, 22 p. :  ill., maps, tables ;  28 cm. 
 -  2050 .
<br/><br/>Includes bibliographical references (p. 19-22). 
<br/><br/> Reinterpretation of iridium anomalies, shocked quartz, and microtektites attributed to cratering events in Cretaceous-Tertiary boundary sections. Evidence from the Ries crater of Germany and Australasian tektites is  essential to understanding giant craters and mass extinction. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cretaceous-Tertiary boundary<br/>Tektite<br/>Extinction (Biology)
<br/><br/><label>Dewey Class. No.: </label>551.77