356 CHARLES S. PROSSER 



Thickness tJSss 



No. Feet Inches Feet Inches 



between the Cedarville and Springfield dolo- 

 mites ought to be drawn. This zone appears 



certainly to belong in the Cedarville and pos- 

 sibly it may be the base '. . . . 4 7 53 11 



19. Zone on southern wall with abundant specimens 



of Pentamerus oblongus Sowerby; but on the 



western wall the fossils are not common 3 49 4 



18. Rather compact, light-gray rock containing 



abundant crinoid stems and an occasional speci- 

 men of Pentamerus oblongus Sowerby. Some 



chert in more or less definite layers. On the 



western wall a zone corresponding to this and 



including the superjacent 3 inches is rather 



clearly marked. It contains chert in layers and 



has a thickness of 4 feet 10 inches 3 3 49 1 



17. "First cap rock" of the quarry men. Gray 



and very porous rock, the cavities to a large 



extent apparently due to the solution of fossils. 



This zone has the lithologic appearance of the 



Cedarville dolomite, and it is not improbable 



that it belongs in that formation. According 



to Mr. E. T. Paul, manager of the Lewisburg 



Stone Co., the thickness of this zone is variable 



and "runs from 2 feet up to about 5 feet; the 



average, however, being about 3I feet." 36 45 10 



Feet Inches 



16. Springfield dolomite. — The four follow- 2 2 



ing layers are composed of light-gray 1 4 



to perhaps buff-colored rock, which 8 



has rather compact texture. It is 1 5 



now used for cut stone 5 7 42 4 



15. Buff, massive zone which splits into 2 or 3 



layers and contains Calymmene niagarensis Hall. 



This zone and the superjacent 4 layers are 



called "buff rock" by the quarrymen 3 o 36 9 



14. Mottled zone. — "Second cap rock" of the quar- 

 rymen. Light-gray, porous rock with dark- 

 gray spots and blotches. It contains crinoid 



segments and fragments of other fossils. The 



lithologic appearance of the zone is very similar 



to that of the mottled zone in the Jackson and 



Maxwell quarries and the interval between the 



