GLACIAL GEOLOGY 
421 
bucion de los Depositos Glaciares del Permico conocidos en la 
Argentina y su significacion para la estratigafia de la paleogeo- 
grafica del hemisferio austral” has brought together all that 
is known concerning the Permian glacial deposits of Argentine 
in a paper published in the Bulletin of the National Academy at 
Cordoba. Tillites in Argentina were first discovered in 1912 in 
the Sierra of Pillahuinco in the province of Buenos Aires. 
Two years later they were reported from numerous localities 
