404 A. F. FOERSTE — LIMESTONES OF TENNESSEE AND KENTUCKY 



road a quarter of a mile west of the station, at a recenth'' opened quarry. 

 The lowest exposure of Clinton rock occurs along the railroad track near 

 the statiou. A covered space of 18 feet intervenes between the lowest 

 exposure of the Clinton and the top of the Ordovician rocks in the banks 

 along the river. The thickness of Clinton rock actually exposed is 80 

 feet, but the covered interval makes it possible that the total thickness 

 may be greater. A comparison wdth other sections, farther southward, 

 makes it more probable, however, that the unknowni interval is chiefly 

 occupied by soft Ordovician rocks. It is interesting to note that Mr 

 Charles Schuchert cites Triplecia ortoni as occurring in the Clinton at 

 Nevvsom. This is one of the most widel}' distributed and most charac- 

 teristic fossils of the Clinton in Ohio and along the western flank of the 

 Cincinnati anticline, although not often represented by many specimens. 



All of the Silurian limestone, 33 feet thick, underlying the Black shale 

 (Devonian) above Carol Litton's house, a quarter of a mile above the 

 Tom Fox locality (locality 18), in the northern part of Maurv county^ 

 belongs to the Clinton. Farther down Leipers creek, at the old Oil well, 

 the top of the section must belong in part to the Osgood horizon. 



At Centerville, along the railroad track (locality 25), at least 121 feet 

 of limestone, underlying beds which weather more readily, must be 

 assigned to the Clinton. They contain Trij^lecia ortoni and other fossils. 

 An interval of 20 feet between the lowest Clinton exposure along the 

 railroad and the Ordovician limestones which line the river bank does 

 not present exposures. Since at least 20 feet of Clinton limestone are 

 exposed at the bridge northeast of town, it is certain that at least a i)art 

 of the covered interval northwest of town is occupied by Clinton rocks. 

 Whether the total thickness reaches 30 feet is uncertain. 



Along Swan creek, west of Anderson Morris' house (locality 30), at 

 least 26 feet of Clinton are exposed, and the base is not seen. 



So far as may l)e determined at present, the Clinton diminishes in 

 thickness rapidly in passing from Whites Bend northeastward to the 

 Wood and Weeks localities, but between Whites Bend and the most 

 southern exposures along the flank of the anticline, showing the entire 

 thickness of the Clinton between the Ordovician and the Osgood beds, 

 the thickness remains either comparatively constant or is slightly 

 diminished. 



The cherty character of the Clinton, as seen near Newsom and Linton, 

 is not so strongl}'' in evidence farther southward. Near Carol Litton's 

 house only the upper half of the Clinton is very cherty. Near Center- 

 ville onl}^ the uppermost layers are cherty. This is true also of the ex- 

 posures along the valle}^ of Swan creek. Near the home of Anderson 

 ]\rorris (locality 30) the middle and lower part of the Clinton consists of 

 whitish limestone, free from chert. 



