MARYLAND GEOLOGICAL SURVEY 125 



cation in the Talbot occurs just north of Lyons Creek, in Anne 

 Arundel Count}'. The following section was taken on the banks of 

 Anacostia River, near Washington : 



Section on icest side of Anacostia River south of Pennsylvania avenue, 

 Washington, D. C. 



Talbot : 



Ft. In. 



Sandy loam, light yellow to brown in color 3 6 



Fine yellow sand with here and there isolated pebbles 

 or thin lenses of gravel 4 to 6 inches thick; gravel 



up to 6 inches in diameter 7 



Mass of gravel of all sizes, unstratified, some several 

 feet in diameter; yellow sandy matrix; strife on 

 gravels; materials generally fresh in appearance; a 

 few small lenses of yellow sand free frqm gravel. 

 In places iron crusts have formed in the sand and 

 gravel, cementing them together. Amount exposed.. 11 



21 6 



Physiograpliic Expression. — The Talbot formation is developed 

 as a terrace capping, fonning the Talbot plain described under 

 the heading ''Topographic features.'' It wraps around the lower 

 margin of the Wicomico terrace, from which it is separated in most 

 places by a low escarpment. From the base of the Wicomico-Talbot 

 scarp, which is at an elevation of 40 to 45 feet, the surface of the 

 Talbot formation slopes gently toward the surrounding waters. This 

 surface has chiefly, if not entirely, the initial slope which was im- 

 parted to it during its period of deposition. Usually this terrace is 

 terminated by a low scarp cut by the waves of Chesapeake Bay or 

 its estuaries, but locally it slopes gently to the water's edge. The 

 Talbot formation has suffered less erosion than either the Sunderland 

 or the Wicomico. It has been elevated above the water for so short 

 a time that such streams as have found their way across its surface 

 have not been able to change materially its original level character. 



Paleontologic Character. — In the Maryland portion of the Coastal 

 Plain there are a number of localities at which fossil remains of either 

 plants or animals or both occur in the Talbot deposits. The only 

 specimen of animal remains found in the Talbot deposits of Prince 

 GJeorge's County consist of a bone of a mammoth determined by 

 J. W. Gidlev as the rielit humerus. It was found about 214 miles 



