THE METAMORPHISM OF GLACIAL DEPOSITS? 
FRANK CARNEY 
Denison University 
INTRODUCTION 
FIELD DATA 
Color of the altered drift 
Its texture and structure 
Folding, jointing, faulting 
Weathering 
AGENCIES OF ALTERATION 
Chemical 
Saturated condition of sub-glacial sediments 
Oxidation and deoxidation 
Carbonation; hydration 
Pressure 
Weight of superincumbent drift 
Weight of superjacent ice 
Due to hydration 
SUMMARY 
INTRODUCTION 
Glacial drift metamorphosed to a conglomerate has been studied 
in several parts of the world. A detailed description of such a con- 
glomerate in South Australia, identified as a Cambrian tillite, has 
recently appeared;? glacial formations of the same period have been 
studied in China. In India,+ Africa,s>- and South Australia,4 
glacial conglomerates of Permian age have been carefully investigated. 
t Published by permission of the Ohio Geological Survey, but the author is respon - 
sible for the opinions expressed. Read before Section E of the American Association 
for the Advancement of Science at Baltimore, 1908. 
2 Rey. Walter Howchin, ‘‘Glacial Beds of Cambrian Age in South Australia,” 
Quart. Jour. Geolog. Soc., Vol. LXIV (1908), pp. 234-59. The same author made a 
preliminary report in rgo01, Tvans. Roy. Soc. of South Australia, Vol. XXV, p. to. 
3 Willis, Blackwelder, and Sargent, Research in China, Vol. I (1907). 
Carnegie Institution, Washington. 
4C. D. White, American Geologist, Vol. III (1889), pp. 306-11. Chamberlin 
and Salisbury, Geology, Vol. II (1906), pp. 632-35. 
5 C. D. White, op. cit., pp. 303-6. Chamberlin and Salisbury, op. cit., pp. 635-38. 
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