62 THE PHYSICAL FEATURES OF CECIL COUNTY 



1901. 



Clark, William Bullock, and Martin, George Curtis. The 

 Eocene Deposits of Maryland. 



Md. Geol. Surv., Eocene, 1901, pp. 19-92, plates i-ix. 



Systematic Paleontology, Molhisca. 



Ibid., pp. 122-203, plates xvii-lviii. 



Leonard, Arthur Gray. The Basic Rocks of Northeastern 

 Maryland and their Relation to the Granite. 



Amer. Geol., vol. xxviii, 1901, pp. 135-176, plates xv^xix. 



Shattuck, George Burbank. The Pleistocene Problem of the 



North Atlantic Coastal Plain. 



Johns Hopkins Univ. Circ. No. 152, 1901, pp. 69-75. 

 Amer. Geol., vol. xxviii, 1901, pp. 87-107. 



Maryland Geological Survey. Maryland and its Natural Ee- 



sources. 



Official Publication of the Maryland Commissioners, Pan-American Expo- 

 sition, Baltimore, 1901, 38 pp., map. 



Maryland Geological Suryey. Maryland and its Natural Ke- 



sonrces. 



Official Publication of the Maryland Commissioners, Inter-state West 

 Indian Exposition, Baltimore, 1901, 38 pp., map. 



1902. 



Maryland Geological Survey. Volume Four. 

 The Johns Hopkins Press, Baltimore, 1902. 



Hies, Heinrich. Report on the Clays of Maryland. 



Md. Geol. Surv., vol. iv, 1902, pp. 203-505. 



