47° CHARLES S. PROSSER 



them. Opposite Sharpsville and farther down Turtle Creek than 

 the place above mentioned Dr. Foerste reported "a thin, sandy 

 layer, very undulated, like ripple-marks where waves have crossed 

 from various directions. Their importance was not appreciated, 

 when observed, and their direction was not carefully noted. 

 Judging from the memory alone the larger ripples had a general 

 northeast course and indicated currents transverse to this direc- 

 tion." 1 



Near Peebles. — In the Peebles Stone Company quarry, on the 

 northern side of the Norfolk & Western Railway, one-half mile 

 west of Peebles, is a layer 7 feet 10 inches above the base of the 

 West Union limestone, the surface of which is conspicuously ripple- 

 marked. The rock is bluish gray in color, massive, contains 

 Brachiopods, and the upper surface is very crinoidal. On the 

 crests of the ripple-marks are furrows which are apparently trails. 

 The majority of the ripple-marks run in a regular direction, which 

 is N. 6° W.; but an occasional one runs in an irregular direction. 

 The distance between two parallel crests is 27 inches and the trough 

 is if- inches deep. The distance between two other conspicuous 

 crests is 3 feet 10 inches, with a much smaller ripple-mark about 

 half-way between them. In general the eastern slopes appear 

 to be the steeper, although part of them do not show any particular 

 difference, and one is apparently steeper on the western side. 



About one-fourth mile west of Peebles in the bank of a small 

 stream on the northern side of the Norfolk & Western Railway 

 ripple-marks occur in Niagaran limestone. Ripple-marks are 

 clearly shown in two layers of crinoidal limestone at this locality. 

 In the lower layer one of the ripple-marks runs N. 6° W., and another 

 one, N. 2 W. The crests are 22-23 inches apart and one trough 

 is 4 inches deep. In general the more gradual slope is to the east 

 and the steeper to the west, although in one of them the eastern 

 slope appeared to be the steeper. In the upper layer the ripple- 

 marks run N. 5 E., the crests are 44-45 inches apart, a trough 

 is 4^ inches deep, and the steeper slope is to the east. 



This locality was described as follows by Dr. Foerste: 



Along the railroad about a quarter of a mile west of Peebles, where the 

 railroad crosses a creek, there are very good wave-marks in the rock on the 



'Jour. Geo!., Ill (1895), 17S. 



