RIPPLE-MARKS IN OHIO LIMESTONES 467 



section, on Lick Fork. 1 He gave the top of the upper one (No. 13) 

 as 4 feet 9! inches below the top of a flinty layer (No. 1) (appar- 

 ently one of the layers of the Dayton limestone), which he seemed 

 to consider the top of the flinty limestone. 2 This upper "waved 

 stratum" is given as 3 inches thick, with 20 inches mostly of marl 

 between it and the lower "waved layer" (No. 17) which is reported 

 as 7 inches thick. 



Sproull Glen. — This glen is on the R. C. Sproull farm, now owned 

 by Mrs. Jennie Black and Dr. O. T. Sproull, not far from Sproull 

 Bridge over Ohio Brush Creek, 6 miles southwest of Peebles. The 

 heavy rains of July, 191 5, had deepened and cleared out the bed of 

 this stream to such an extent that three layers of ripple-marked 

 limestone were exposed which on a visit to the same glen in Sep- 

 tember, 1 914, were not seen. 



The lowest ripple-marked layer was shown on the northern side 

 of the stream with ripple-marks running N. io° W. to N. 30 W. 

 One foot 5 inches higher is another limestone layer 7 inches thick 

 with ripple-marks imperfectly shown on its upper surface. Also 



3 feet higher ripple-marks occur on thin layered limestones; but 

 the last two layers were so poorly shown that not many data could 

 be obtained concerning the ripple-marks. The top of the third or 

 highest ripple-marked layer is 9 feet 9 inches below the base of the 

 10-inch zone of Whitfieldella quadrangularis Foerste 3 in the Brass- 

 field limestone, and 9 feet 3 inches below the top of this formation 

 as exposed in the third fall, or 13 feet 6 inches below the top of the 

 very hard Dayton limestone as exposed in the stream above this fall. 



Laws he quarry. — This old quarry is located on the Vincent 

 Robbins farm, north of Lawshe, Adams County, on the Cincinnati 

 Division of the Norfolk & Western Railway. Ripple-marks were 

 noted near the western end of the quarry, which are not well exposed 

 but run N. 16 E. The ripple-marked layer occurs from 1 foot 



4 inches to 2 feet below the base of a rather conspicuous 2 foot 2 inch 



1 Second Ann. Rept. Geol. Survey Ohio, 1838, pp. 244, 246, and PI. 6, opposite p. 242, 

 on which only one waved layer is indicated in the flinty limestone. 



2 Ibid., p. 244, where he states that "the upper layer of the flinty stratum is 

 peculiarly marked. It is about one foot thick, and contains so much silex that it has 

 the sharp conchoidal or flinty fracture, and gives fire with steel." 



3 Kentucky Geol. Survey, Bull. No. 7, 1906, p. 41. 



