400 



ElvPORT OF STATE GEOLOGIST. 



thickness, while the Louisville limestone is greatly attenuated, if* 

 not entirely absent. The explanation of this fact is to be found in 

 the greater comparative proximity of this locality to the broad crest 

 of the Cincinnati geanticline, the limestone thinning in that direc- 

 tion as well as toward the north. The following section is exposed 

 along the ravine crossing the village just west of the school house : 



Section at Hanover West of Schoolhouse. 



Feet. 



Light gray limestone with an abundance of Devonian fossils 31/2 



Dark buff saccharoidal magnesian limestone, massive or heavy bedded. 



usually rather soft (Greneva limestone) 8 



Bluish gray calcareous and argillaceous shale and covered (Waldron) ' 3 



Thin bedded, hard, drab limestone 35 



Bluish arenaceous magnesian, thin bedded, shaly limestone and shale. 6 

 Brownish buff limestone, weathering in thin layers (Clinton) 



The above section shows the Laurel limestone and Osgood beds 

 to have together a thickness of 41 feet at Hanover, while the Louis- 

 ville limestone, if present, -is represented by but a small fraction 

 of the three feet which includes the Waldron shale horizon. 



The only locality at Hanover where the Waldron shale is known 

 to be both fossiliferous and so exposed as to permit its fossils to be 

 separated from the shale by weathering is on the schoolhouse 

 grounds. The fossils collected here are the following : Mariacrinus 

 carleyi (Hall), Eucalyptocrinus sp., Atrypa reticularis, Spirifer 

 radiatus, and Dalmanites verrucosus. This fauna, though small, 

 represents a combination that might be expected anywhere in the 

 Waldron shale, but is such as would not be found in the limestone 

 above or below it. Mariacrinus carleyi is known only in the Wal- 

 dron shaie. The meager character of those found is no doubt due 

 in part to the accessibility of the locality in the center of the vil- 

 lage where its weathered fossils have long been collected. 



The Fourteen Mile Creek drainage basin includes the southern- 

 most outcrops of the Waldron shale. Northwest of New Washing- 

 ton, near the Sulphur Springs, the shale shows a thickness of about 

 6 feet, overlaid by 9 feet of the Louisville limestone. The southern- 

 most appearance of the Waldron shale in Indiana is at Charleston 

 Landing, on the Ohio, a short distance below the mouth of Fourteen 

 Mile Creek, where Foerste reports" it to be 6 feet in thickness. In 

 the lower Fourteen Mile Creek basin the Laurel limestone has con- 

 siderably changed in composition and color, nnd become nn argil- 



«21st Ann. Hopt. Ind, Dept. Gool. and Nat. Kcs„ l.S!)7. ]). L'.'M. 



