RIPPLE-MARKS IN OHIO LIMESTONES 



471 



north side of the railroad, in a sort of quarry. The rock is of a bluish tint, 

 and is some distance above the Niagara shales. It is presumably of the 

 Springfield horizon. The crests of the waves run here north 3 east; they are 

 about 3! inches above the troughs of the waves, and are about 42 inches apart, 

 showing therefore approximately the same characteristics as the waves of 

 Clinton age in Elk Run. They descend more rapidly eastward than westward. 

 The wave-marks are seen at several levels through a thickness of 2\ feet 



Fig. 5. — Nearer view of part of layer shown in Fig. 4. Photograph by C. W. 

 Piatt. 



of rock Where the railroad crosses the creek, 50 feet towards the 



southeast, the wave-marks are shown over a larger area. The crests here run 



north 5 west. 1 



« 



Dr. Kindle has also made reference to this locality. 2 

 Another locality of Niagaran ripple-marks is southwest of 

 Peebles on the dirt road for Lawshe, about one-fourth mile west 

 of the West Union and Locust Grove Pike. The ripple-marks 

 are shown in the highway to the west of a run, and the first house 

 to the west is that on the farm of James Graham. The ripple- 

 marks run north and south, the crests are 20, 21, and three of them 

 24 inches apart. The more gentle slope appears to be to the west 



1 Jour. Geol., III (1895), 190. 



Ibid., XXII (19 14), 711. 



