4 68 CHARLES S. PROSSER 



layer, which is i: feet 10 inches above the top of the "chert zone" 

 in the basal part of the Brassrield limestone and 16 feet 10 inches 

 higher than the lowest outcrop in this quarry. The 2 foot 2 inch 

 layer is variously colored crystalline limestone, which on the 

 weathered faces is apparently cross-bedded and contains a good 

 many pebbles, more or less flat, and some of them of considerable 

 size. The top of the massive layer just described is about 22 feet 

 below the top of the Brassrield limestone and nearly 24^- feet below 

 the top of the hard Dayton limestone. 



Elk Run. — On Elk Run (called Elm Run on the Highway 

 Map of Highland County), 25 miles northeast of Belfast, High- 

 land County, are ripple-marked layers in the Brassrield limestone, 

 which are well shown in the stream a few rods below the iron high- 

 way bridge on the upper road from Belfast to Elmville. This layer 

 is a crystalline limestone, from h to 3 inches thick, which contains 

 fossils and some pebbles. The ripple-marks run N. 8o° E., the 

 steeper slope is to the north and the more gradual one to the 

 south. The crests range from 26 to 36 inches apart, 32 inches being 

 the most frequent distance. The deepest trough noted is about 

 zh inches lower than the crest. A ferruginous limestone 1 foot 

 4 inches thick occurs just above the crystalline, ripple-marked 

 layer, and another 4-inch ferruginous limestone layer just above 

 this, the upper surface of which is apparently ripple-marked. 

 Below the ripple-marked, crystalline limestone is a layer 1 foot thick 

 containing fossils and numerous pebbles of Brassrield limestone. 

 The majority of the pebbles are rather flat and fairly well rounded 

 on the margins. The size of some of the larger pebbles is indicated 

 by the following figures: one 8^ inches long, and three rectangular 

 ones respectively 9X6, 9X8, and 9X8^ inches. The pebbles as a 

 rule lie flat (horizontal) or at least nearly so in the rock; but there 

 arc some that are imbedded at more or less of an angle. 



Attention was first called to this locality by Dr. Foerste, who 

 has written as follows concerning it: 



By far the most interesting feature of the locality, however, was the 

 presence of great wave-marks, wonderfully distinct and well exposed for a 

 distance of a hundred feet down the creek. The line of strike of these wave- 

 marks was magnetically about north 65 east. The crests of the wave-marks 



