f r 



New York State Museum Bulletin 



r 



Entered as second-class matter November 27, 1915 at the Post OflSce at Albany, N. Y., 



under the act of August 24, 1912. Acceptance for mailing at special rate of postage 



provided for in section 1103, act of October 3, 1917, authorized July 19, 1918. 



Published monthly by The University of the State of New York 



Nos. 225-226 



ALBANY, N. Y. 



September-October 1919 



The University of the State of New York 

 New York State Museum ' 



John M. Clarke, Director 



GEOLOGY OF THE WEST POINT QUADRANGLE, N. Y. 



BY 



CHARLES P. BERKEY AND MARION RICE 



PAGE 



Preface 5 



Introductory description 7 



General geology 16 



Petrographic geology — ^rock for- 

 mations 29 



PAGE 



Structural geology 69 



Economic and engineering geology 82 



Historical geology 105 



Physiography 141 



Index \ 149 



MiS7r-Ja2i-i30 



ALBANY 



THE UNIVERSITY OF THE STATE OF NEW YORK 



1921 



