44 THE PLIOCENE AND PLEISTOCENE DEPOSITS OF MARYLAND 



Contains three maps for canals on Eastern Shore, one triangulation map of bay, and 

 large scale contour maps of southern part of Western and Eastern Shores, with 

 explanations. 



Report of the Geologist, pp. 35-84. 



Physical geography, geology, and resources of Dorchester, Somerset, Worcester, and 

 St. Mary's counties. Suggests the presence of old beaches in these counties. 



, Report of the Engineer and Geologist in relation to the 



New Map to the Executive of Maryland. 



Md. Pub. Doc, Dec. Sess., 1835 [Annapolis, 1836], 8vo, 84, 1 pp., 6 maps and 

 plates. 



(Rev.) Amer. Jour. Sci., vol. xxx, 1836, pp. 393-394. 



Jour. Franklin Inst., vol. xviii, n. s. 1836, pp. 172-178. 



Shows the report to be economic and preliminary. Its appearance is the occasion 

 for remarks on the organization and appropriations of the other then existing surveys. 



1837. 



Ducatel, J. T. Outline of the Physical Geography of Maryland, 

 embracing its prominent Geological Features. 



Trans. Md. Acad. Sci. and Lit., vol. i, 1837, pp. 24-54, with map. 



Refers in many places to the sandy, clayey, and gravelly soils of the regions. Also 

 mentions the deposit of comparatively recent shells near mouth of Potomac river (Corn- 

 field Harbor). 



, and Alexander, J. H. Eeport on the New Map of Mary- 

 land, 1836. 8vo, 104 pp. and 5 maps. [Annapolis, 1837.] 



Md. House of Delegates, Dec. Sess., 1836. 



Another edition, 117 pp. 



Brief mention is made of the " diluvial gravel " which overlies the fossiliferous marls 

 while in a few sections given undoubtedly the upper portions are Pleistocene materials. 



1838. 



Ducatel, J. T. Annual Eeport of the Geologist of Maryland, 1837. 

 [Annapolis, 1838.] 8vo. 39, 1 pp. and 2 maps. 

 Md. Pub. Doc, Dec Sess., 1837. 

 Refers briefly to the gravel, sand, and clay deposits of Kent and Cecil counties, Md. 



1839. 



Conrad, T. A. Xotes on American Geology. Observations on char- 

 acteristic Fossils, and upon a fall of Temperature in different geological 

 epochs. 



Amer. Jour. Sci., vol. xxxv, 1839, pp. 237-251. 



Concludes angular blocks in " diluvial " deposits were transported by glaciers or 

 ice-bergs. 



