MARYLAND GEOLOGICAL SURVEY 61 



Clark, William B. Descriptions of the Geological Excursions 

 made during the Spring of 1895. 



Johns Hopkins Univ. Circ, vol. xv, 1895, pp. 1-2. 



Brief descriptions of all the Coastal Plain formations are given while the 

 strata exposed in the bluffs at Fort Foote and Fort Washington are mentioned. 



Clark, Wm. B. Contributions to the Eocene Eauna of the Middle 

 Atlantic Slope. 



Johns Hopkins Univ. Circ, vol. xv, 1S95, pp. 3-6. 



The author makes the following statement: "I am, therefore, strongly of 

 the opinion, upon both geological and paleontological grounds, that the 

 Eocene deposits of the Middle Atlantic slope represent the greater portion 

 of the Eocene series of the Gulf, its highest members alone excepted." Many 

 localities in Maryland and Virginia are given where Eocene fossils have been 

 obtained and many new species are described. 



Merrill, George P. Disintegration of the Granitic Rocks of 

 the District of Columbia. 



Bull. Geol. Soc. America, vol. vi, 1895, pp. 321-332, pis. 16. 



Describes the weathering of foliated micaceous granite in the northwestern 

 portion of the District of Columbia. 



Merrill, G. P. The Formation of Sandstone Concretions. 

 Proc. U. S. National Museum, vol. xvii, 1895, pp. 87-88, pi. 

 The writer describes some concretions from the Potomac deposits. 



Ward, Lester F. The Potomac Eormation. 

 15th An. Rep. U. S. G. S., Washington, 1895, pp. 307-397, 3 pis., 5 figs. 

 General description of the Potomac deposits as known at that time. Mary- 

 land details of the strata in this county are given. 



1896. 

 Cl.vrk, W. B. The Eocene Deposits of the Middle Atlantic Slope 

 in Delaware, Maryland, and Virginia. 

 Bull. U. S. G. S. No. 141, 167 pp., 40 pi. 



An exhaustive study of the Eocene in which the stratigraphy and paleon- 

 tology of the deposits are discussed in detail. 



