GEOLOGICAL LITERATURE OF THE VIRGINIA COASTAL PLAIN. 31 



Cetacean remains from the Miocene of Westmoreland County, Richmond and City 

 Point are described and figured. The statement is made that remains of walrus have 

 been found in the superficial deposits of Accomac County. 



1871 



Cope, E. D. Synopsis of the Extinct Batrachia, IJeptilia, and Aves of 

 North America. 



Trans. Amer. Philos. Soc, vol. xiv, pp. 1-252. 



Mention Is made of the beak of an Eocene fish Ccelorhynchus ornatus Leidy found 

 near Petersburg, and a crocodile from "Eocene" of Eastern Virginia. 



1872 



Shaler, N. S. On the Canses which have led to the Production of 

 Cape Hatteras. 



Proc. Boston Soc. Nat. Hist., vol. xiv, pp. 110-123, 1872. 



Abstr. Amer. Nat., vol. v, pp. 178-181, 1871. 



The author believes that Delaware and Chesapeake bays were excavated by streams 

 of ice which poured down the valleys of the Delaware and Susquehanna rivers during 

 the Ice Age and the resulting debris was dropped farther south, forming Cape Hatteras 

 and the eastern part of Virginia. The difference in topography south of the .Tames River 

 Is supposed to be due to a recent subsidence of that region which was contemporaneous 

 with the uplift of the northern part of the country on the melting of the ice sheet. 



1873 



HoTCHKiss, Jed. On the Virginias; their Agricultural, Mineral, and 

 Commercial Eesources. 



Soc. Arts (London) Jour., vol. xxi. pp. 238-251, 1873. 



The article contains a brief description of the "Tide-water Country." 



1875 



"Webster, N. B. On the Physical and Geological Characteristics of the 

 Great Dismal Swamp and the Eastern Counties of Virginia. 



Amer. Nat., vol. ix, pp. 260-262, 1875. 



The writer supposes that the basin of Lake Drummond was formed by the burning 

 of the peat at some time in the past and the depression resulting was later filled with 

 water. "The perpendicular banks of the lake and the charred stumps that have be?n 

 found at the bottom confirm this supposition." 



1876 



Coryell, Martin. Diatomaceous Sands of Eichmond, Va. 

 Trans. Amer. Inst. Min. Eng., vol. iv, pp. 230-232, pi., 1876. 

 The Virginias, vol. ii, pp. 6-7. 



The brief article is accompanied by a profile showing the geological structure of 

 Church Hill between Shockoe and Gillies creeks. 



