150 STRATIGRAPHY THE CONEMAUGH SERIES. 



30 feet into the hill. The joint and bedding planes are ir- 

 regular but far enough apart so that the stone quarries into 

 large blocks. The Coal and Coke Railway used this stone for 

 bridge abutments. 



THE AMES LIMESTONE AND SHALE. 



The Ames Limestone, first named and described by An- 

 drews of the Ohio Geological Survey, and later subdivided by 

 Hennen 15 into the Upper Ames Limestone, Ames Shale and 

 Lower Ames Limestone, all of which carry marine fossil 

 shells in West Virginia, occurs frequently in Lewis but is en- 

 tirely below drainage in Gilmer. The group docs not pre- 

 serve its type appearance as found in Harrison and other 

 northern counties, but the two hard limestone strata are usual- 

 ly absent, only the green shale between them being found. 

 This generally occurs at 250 feet to 275 feet below the Pitts- 

 burgh Coal. In Hackers Creek and Freemans Creek Districts, 

 the shale is mostly dark green and carries abundant marine 

 shells, being 10 to 20 feet thick. The following exposure, 

 observed along the west side of the West Fork River, one- 

 half mile north of Lightburn shows its typical appearance in 

 these districts : 



Feet. 



Shale, red 



Sandstone, shaly, Grafton '. 3 



Shale, green, with streaks of limestone and many marine 



fossils at base, Ames 15 



Coal, streak, Harlem, (1055' B.) 



On Jesse Run, one-fourth mile below the mouth of Bills 

 Lick, and 3.8 miles eastward from Jane Lew, a hard lime- 

 stone, carrying abundant marine fossils, was observed at the 

 Ames horizon at an elevation of 1070' B. 



The following section was obtained in the trolley CUT 

 just south of Bennett Stop at the Fair Grounds, north of 

 Weston : 



"Ray V. Hennen, Doddridge-Harrison Kept., W. Va. G. S., p. 250; 



