vl CONTENTS TO VOLUME XX 
NUMBER III 
AUSTRALIAN GLACIATIONS. Walter Howchin 
Tue VALUE OF CERTAIN CRITERIA FOR THE DETERMINATION OF THE 
ORIGIN OF FOLIATED CRYSTALLINE Rocks. I. J. D. Trueman 
SILICEOUS OOLITES AND OTHER CONCRETIONARY STRUCTURES IN THE 
VICINITY OF STATE COLLEGE, PENNSYLVANIA. Elwood S. Moore 
PETROLOGICAL ABSTRACTS AND REVIEWS 
REVIEWS 
NUMBER IV 
DyNAMIC RELATIONS AND TERMINOLOGY OF STRATIGRAPHIC CONFORM- 
Iry AND UNCONFoRMITY. W. O. Crosby 
THE VALUE OF CERTAIN CRITERIA FOR THE DETERMINATION OF THE 
ORIGIN OF FOLIATED CRYSTALLINE Rocks. II. J. D. Trueman 
AN OCCURRENCE OF COAL WuHiIcH BEARS EVIDENCE OF UNUSUAL CON- 
DITIONS ACCOMPANYING Its DEpPosITION. Jesse E. Hyde 
THE GEOLOGY OF SOUTH MOUNTAIN AT THE JUNCTION OF BERKS, 
LEBANON, AND LANCASTER COUNTIES, PENNSYLVANIA. H. N. 
Eaton 
MURAENOSAURUS ? REEDII, SP. NOV., AND TRICLEIDUS ? LARAMIENSIS 
KNIGHT, AMERICAN JURASSIC PLESIOSAURS. Maurice G. Mehl 
Metamorpuic Stupies. C.K. Leith and W. J. Mead . 
PETROLOGICAL ABSTRACTS AND REVIEWS . 
REVIEWS 
RECENT PUBLICATIONS 
NUMBER V 
Tue EvipENCE OF THREE DISTINCT GLACIAL EPOCHS IN THE PLEISTO- 
CENE HISTORY OF THE SAN JUAN MounraIns, Cotorapo. Wallace 
W. Atwood and Kirtley F. Mather 
THE OLp EROSION SURFACE IN IpaHo: A Criticism. Eliot Black- 
welder 
GLACIATION OF THE ALASKA RANGE. Stephen R. Capps 
SomE SMALL NATURAL BRIDGES IN EASTERN WyoOMING. V. H. Barnett 
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