170 



Cincinnati Society of Natural History. 



lower down is seen the top of the blue clay layer, and blue clay is 

 found down to the level of the creek bed, about fifteen feet lower 

 down. 



7. Spring Hill — also known as Wilkerson's Hill; on the pike 

 from Wilmington to Lebanon, about 6% miles a little south of west of 

 the Todd's Fork locality. At the east end of this hill, where the pike 

 rises from the low lands formed by the Cincinnati group to the upper 

 level formed by the hill or ridge, the Clinton is exposed at the way- 

 side. About 10 feet of the lower half of the group is seen. It is 

 identical in character with the lower Clinton at Todd's Fork ; it has a 

 pinkish color, is composed of a great quantity of crinoidal fragments, 

 chiefly pieces of small crinoid stems and the materials show bedding, 

 with at times a sort of cross bedding. The upper Clinton is not ex- 

 posed. Almost facing this exposure is the house of J. H. Vander- 

 voort. Behind his house the Clinton is seen to overlie the Belfast 

 bed, this formation having here a thickness of about five feet. Under- 

 neath are at least three feet of a light blue clay. The lower Clinton and 

 the Belfast bed are again well seen in the excavations or quarries 

 along the edge of the woods one-eighth of a mile farther north, down 

 the farm lane. At the roadside the Clinton contains Encrinurus punc- 

 tatus, pygidium, Phylloporina angulata, Hemitrypa ulrichi, Haly sites 

 catemtlatus, Favosites niagarensis. Fossils were scarce. The Belfast 

 bed here has a light, yellowish brown color, this color being probably 

 the result of weathering, the original blue having been altered under 

 the influences of long exposure. 



8. Betty Heidtfs Quarry — about half way along the road lead- 

 ing from the Olive Branch School District No. 2 (on the Wilmington 

 and Lebanon Pike) to Oregonia and about 5^ miles west of the 

 Spring Hill locality. At this point is found a large slab of Clinton 

 rock, said by Prof. Orton, on page 385, volume III, of the Ohio 

 Geological Survey, to be about 16 feet thick, to have an extent of 

 three fourths of an acre, and to occur 125 feet below the proper 

 horizon for the Clinton. The present worker of the quarry estimates 

 the area covered by the slab at about 3 acres. The Clinton is pinkish 

 in color, and is made up of small crinoidal fragments, similar to the 

 lower two thirds of the Clinton section at Todd's Fork and to the 

 Clinton in Spring Hill ; like it, also, it is practically destitute of other 

 fossils. At the top of the Clinton several inches of rock similar to 



