Meserve — The Champlain Submergence. 



207 



Art. XVI. — Note on the Depth of the Champlain Submer- 

 gence Along the Maine Coast; by Philip W. Meserve. 



It has been noted frequently that a submergence to a 

 depth of about 200 feet took place along the coast of 

 Maine during the Champlain period. Eaised sea beaches 

 are found along the coast on the seaward flanks of low 

 hills such as Black Strap Hill and Poplar Hill, a few 



Fig. i. 



Fig. 1. Champlain Sea-cave, Mt. Ararat, Topsham, Maine. 



miles northeast of Portland, Maine 1 ' 2 and fossil-bearing 

 marine clays are found widely distributed along the coast 

 at a height not greater than 100 feet. 2 



The depth of the Champlain submergence can not be 

 told (exactly from the height of the raised sea beaches, 

 for subsequent erosion has frequently removed or 

 remodeled the sands and gravels of the beach crests. 

 For this reason, the author desires to place on record a 



1 W. M. Davis, Physiography of the Coastal Plain of Maine, in the ' ' Guide 

 to the Vicinity of Boston,' 7 Fiftieth Anniversary Meeting of A. A. A. S., 

 1898, p. 5. 



2 George H. Stone, Glacial Gravels of Maine, U. S. G. S. Monograph, vol. 

 34, pp. 49-59. 



