BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA 



Vol. 14, pp. 207-226, PLS. 19-20 JULY 7, 1903 



SUBMARINE VALLEYS OFF THE AMERICAN COAST AND IN 

 THE NORTH ATLANTIC 



BY J. W. SPENCER 



(Read before the Society December SI, 1902) 



CONTENTS 



Page 



Introduction 207 



Submerged plains off the eastern coast of America 208 



Hudson River channel 209 



Susquehanna and Delaware channels , 210 



Laurentian and other channels 211 



Characteristics of the submerged continental slope 212 



In general 212 



The Susquehannan valley 213 



The Delawarean valley 213 



The Hudsonian valley , 214 



The Fundian valley 214 



The Cansoan valley 215 



The Laurentian valley 215 



Valleys off the Newfoundland banks 215 



Some features of the continental slope 216 



Geological characteristics of the region traversed by the valleys 216 



Some valleys of the North Atlantic and adjacent Arctic basins 218 



Valleys between Greenland and America 218 



Valleys between Greenland and Scotland 218 



Valleys between Iceland and the Faroe islands 219 



Valleys between the Faroe and Shetland islands 219 



Valleys between America and British isles 220 



On the origin of the submarine valleys 220 



Summary and conclusions 224 



Appendix 226 



Introduction 



This paper is intended as a sequel to '' Reconstruction of the Antillean 

 Continent,"* in which, the submarine valleys of the West Indian region 



*Bull. Geol. Soc. Am., vol. 6 (1895), pp. 103-140. 

 XXX— BuLT,. Geol. Soc. Am., Voi„ 14, 1902 (207) 



