CLINTON CONGLOMERATES AND WAVE MARKS. 177 
mentioned. Above the pinkish Clinton, the ferruginous Clinton 
at times shows dark red sandy phases in which Rhynchonella 
acinus var. convexa is often a common fossil, even the calcareous 
shell being at times preserved. This phase may be seen over 
the pinkish Clinton, southeast of Sharp’s house, between the 
house and the stream. Farther southward is the fairly extensive 
quarry of Daniel Sharp, where the Dayton limestone is well 
shown (locality 5). Passing the quarry and descending the 
stream, the fence separating the land of Daniel Sharp from that 
of A. K. Johnson is reached (locality ©). The fence rested 
upon a whitish limestone block containing limestone pebbles, of 
a character lithologically similar to the rock belonging to the 
Lower Clinton of this section. From this point on, for a con- 
siderable distance down the stream (to locality 7, which is a 
heap of boulder fragments), boulders of Clinton rock containing 
pebbles are of more or less frequent occurrence. Since they are 
not found in the zz sf exposures of the Lower Clinton seen 
along Turtle creek, which will be described later, it is evi- 
dent that the boulders belong to the Middle Clinton. At the 
fence above mentioned, the cement of the pebble-bearing rock 
contained Illenus ambiguus, Meristella umbonata and Orthis 
biforata, var. daytonensis. Farther down, the cement contained 
abundant and characteristic Clinton fossils. The pebbles were 
often of fair enough size, at times five or six inches in diameter. 
The pebbles resemble lithologically the more sandy Clinton beds 
just beneath. Continuing southward, the stream enters Turtle 
creek. Following its course downward or westward, a continuous 
line of exposures is found along the northern bank opposite the 
cluster of houses called Sharpsville. The total exposure includes 
a section of 13 feet. Beginning nearer the eastern end of the 
exposures (locality 8) and going downwards, we have at the high- 
est point 16 inches of a sandy stratified limestone; then 12 inches 
of solid white limestone with fossils ; 13 inches of sandy stratified 
limestone; six inches of whitish solid fossiliferous limestone; 30 
inches of sandy, well stratified limestone ; one inch of chert; two 
inches of sandy limestone; two to three inches of white chert; 24 
