MARYLAND GEOLOGICAL SURVEY 73 



it. If we reconstruct the Wicomico terrace by uniting its outliers, we 

 find that the surface of the Wicomico terrace stands at an elevation of 

 90 feet in Cecil county where it abuts against the Sunderland terrace, 

 and slopes toward the surrounding water to an elevation of GO feet. In 

 the vicinity of Baltimore and Washington and in the peninsula of Calvert 

 county, between the Patuxent river and Chesapeake Bay the same 

 general relation holds; but in St. Mary's county, between the Patuxent 

 and Potomac rivers, the altitude of the Wicomico terrace, where it abuts 

 against the Sunderland, gradually sinks until at Eidge the surface of the 

 Wicomico terrace stands at 45 feet and slopes away gradually to Point 

 Lookout until it ends at an elevation of about 15 feet. On the Eastern 

 Shore the surface of the Wicomico terrace stands at an elevation of about 

 90 or 100 feet in the vicinity of Elkton, and at about 45 feet in its 

 extreme southern development a few miles south of Salisbury. It will 

 thus be seen that the surface of the Wicomico terrace maintains a 

 remarkable uniformity throughout its entire extent along the border of 

 the Piedmont Plateau but slopes gently toward the surrounding waters. 



The Talbot Terrace. — Beneath the Wicomico terrace occurs the 

 Talbot terrace. This is the lowest of the subaerial terraces (Plate I). 

 Like the other members of the series, it wraps about them like a border, 

 penetrates them as reentrants and is separated from those above it by a 

 scarp-line (Plate XII). This scarp-line, although usually lower and 

 less conspicious than that separating the Sunderland and Wicomico 

 terraces, is easily discerned and is very continuous throughout the region. 

 It may be typically seen at a large number of localities, among which the 

 following may be mentioned. Along the borders of Elk river in Cecil 

 county ; on the road between Chestertown and Eock Hall in Kent county ; 

 in the vicinity of Brooklyn and Annapolis in Anne Arundel county; 

 along the lower reaches of the Patuxent river in Calvert and St, Mary's 

 counties, and about the flanks of Capitol Hill in Washington City (Plate 

 XIII). 



This scarp has an average height of about 10 feet although it at times 

 disappears altogether and at other times may rise to 20 or 30 feet in 

 altitude. The distribution of the Talbot terrace is similar to that of the 



