TTbe journal of (Secies 



Vol. XXIV CONTENTS FOR FEBRUARY-MARCH 1916 No. 2 



THE ACADIAN TRIASSIC. PART II Sidney Powers ios 



NOTES ON RIPPLE MARKS J. A. Udden 123 



PYROPHYLLITIZATION, PINITIZATION, AND SILICIFICATION OF ROCKS AROUND CONCEPTION BAY, 



NEWFOUNDLAND .-- A. F. Buddington 130 



THE ORIGIN OF RED BEDS. A STUDY OF THE CONDITIONS OF ORIGIN OF THE PERMO- 

 CARBONIrEROUS AND TRIASSIC RED BEDS OF THE WESTERN UNITED STATES. PART I 



C. W. TOMLINSON 



J 



STUDIES IN HYDROTHERMAL ALTERATION. I E. A. Stephenson 180 



ZONAL WEATHERING OF A HORNBLENDE GABBRO - - - Albert D. Brokaw and Leon P. Smith 200 

 REVIEWS - 206 



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