PROCEEDINGS OF THE ROCHESTER ACADEMY OF SCIENCE 



VOL. 5, PP. 123-160. PLATES 3-10. 



THE LAKE DEPOSITS AND EVOLUTION OF THE 

 LOWER IRONDEQUOIT VALLEY. 



George H. Chadwick. 



RocH%s^je», N. Y. 



Published by the Society. 



TuLY, 1917. 



