296 AUGUST F. FOERSTE 



pebble 3% inches long, 28 inches wide, and 2 . 5 inches thick was 

 found. 



The relative position of the pebble-bearing layers among the 

 ripple-marked limestones along Elk Run may be seen from the 

 following section. Ripple-marked layers occur here at various 

 levels in a section at least 30 feet thick. Owing to the fact that the 

 dip of the rocks is in the same direction as the flow of the stream, 

 several layers disappear below the level of the stream at one point 

 and reappear farther down the stream. This makes the unraveling 

 of the section more or less difficult in places, but the following sec- 

 tion, described in descending order, is as nearly correct as may be 

 determined from the present condition of the exposures, which is 

 unusually favorable for this locality. 



SECTION ALONG ELK RUN, 1.5 MILES EAST OF WINCHESTER, 



OHIO 



Ft. In. 



Layer A. Exposed about 600 feet south of railroad bridge; crest 

 of ripples running N. 47 W. Pebbles few. 



Interval 5 



Layer B. Crest of ripples running N. 40 W. 



Interval 3 9 



Layer C. Crest of ripples running N. and S. 



Interval 9 



Layer D. Crest of ripples running N. 40 W. This layer is not ripple- 

 marked southeast of the home of Charles Bailey, but here 

 numerous fine-grained pebbles, many supporting growths of 

 Protarea richmondensis, occur (Figs. 5, 6). 



Interval 1 



Layer E. Crest of ripples running from N. 30 W. to N. 25 W. 



Interval 9 



Layer F. Crest of ripples running N. 35 W. 



Interval 1 6 



Layer G. Crest of ripples varying from N. 3 W. to N. 15 W. at the 

 small fall northeast of the home of Charles Bailey. This 

 layer is exposed also immediately north of the road bridge, 

 and between the road bridge and the railroad bridge. It 

 is characterized by angular, flat pebbles, few in number, 

 but sometimes of considerable length and width, consider- 

 ing the small thickness. 



Interval 6 



