MARYLAND GHOLOGICAL SUEVKT 



93 



Local Sections. 

 The materials which compose the Wicomico formation vary rapidly 

 from place to place. The following sections, however, will give an idea 

 of the character of this formation : 



I. Section at Drum Cliff. 



'•5 J Sanrl 

 ^£1 



Pleistocene. § ^ J sandy clay 



.H § 1 Reddish sand, loam, and gravel. 



o a 



Greenish sandy clay containing fossils 44 



^s 



II. Section at Clifton Mills. 



Feet. Inches. 



Reddish clay loam 12 



Reddish sand and gravel somewhat decayed, carrying 



boulders as large as 1 foot in diameter 5 



Alternately drah clay and sand with iron crusts 15 



Obscure 5 



a '-S Sand, gravel, and boulders 15 



S a 1 Brownish sandy clay 10 



THE TALBOT FORMATION. 



The Talbot formation has been named from Talbot County, Maryland, 

 where it is extensively developed. In St. Mary's County it consists of a 

 wave-built terrace composed of clay, loam, peat, sand, gravel, and ice- 

 borne boulders, which have been deposited by the waves of Chesapeake 

 Bay and its estuaries. The surface of the Talbot formation is coinci- 

 dent with the lowest of the terrace surfaces described above. Since its 

 deposition it has suffered less from erosion than either the Sunderland 

 or Wicomico formations. 



Areal Distribittion. 

 The Talbot formation is developed as a fringe about the margin of 

 the Wicomico and occupies the lowest level of the three terraces. In 



