k 



Map of the Submarine Great Canyon of the Hudson Eiver (by J. W. Spencer). 



Soundings in feet. Isobathic lines 250 feet apart, from that of 500 feet to 8,750 

 feet. Very numerous soundings on continental shelf to 500 feet where the iso- 

 baths are 50 feet apart. A A A A and BBB show course of streams during a 

 late Pleistocene elevation of 250 feet. C is position of the Connecticut canyon or 

 valley, west of which are blank spaces in which the corrected soundings should be 

 1,896 and 2,340 feet. 



