144 STRATIGRAPHY - THE CONEMAUGK SERIES. 



the Pittsburgh Coal bench, was observed on Mudlick Run, 

 0.2 mile northeast of Jacksonville, that represents the Not - 

 mantown Coal. It has also been opened in the edge of Brax- 

 ton County, about one-half mile northwest of Orlando, where, 

 as shown by the section for that place on page 69, it is about 

 one foot thick. 



THE CLARKSBURG RED SHALE, 



The Clarksburg Red Shale of Hennen and the writer 11 

 occurs generally throughout Lewis and Gilmer. This shale 

 is often 40 to 50 feet thick, belonging just under the Norman- 

 town Coal, being usually a deep red color, with occasional 

 nuggets of lime. Another red bed similar to this one also 

 occurs between the Little Clarksburg Coal and the Lower Con- 

 nellsville Sandstone that possibly represents the upper por- 

 tion of the Clarksburg Reds as originally described at Clarks- 

 burg, since the Lower Connellsville Sandstone appears to be 

 a lenticular formation occurring in the body of the reds. 



The following exposure of the Clarksburg Red Shale was 

 noted on the property of B. J. Life, along the Baltimore and 

 Ohio Railroad cut at Fisher Summit, Hackers Creek Dis- 

 trict, Lewis : 



Feet. 



1. Interval from Redstone Coal ....................... 150 



2. Sandstone, shaly, Lower Connellsville .............. 25 



3. Shale, red, to railroad grade, Clarksburg Red Shale 



(1235' L.) ....................................... .' 25 



A sample was collected from No. 3, the analysis of which 

 is reported as follows by Krak : 



smca (Si o s > .............. .................... *? 



Ferric Iron (Fe 2 O 3 ) .......................... g 20 



Alumina (ALO 3 ) ............... " on R1 



Lime (CaO) ........................ .'.'.'.'.'. i.iJ 



Magnesia (MgO) .......................... 



Potassium Oxide (K_O) ............. ' o'og 



Sodium Oxide (Na.6) ......... .' ____ 



Titanium Oxide (TiO,) ...... 



Phosphoric Acid (RO-,) ............. 48 



Moisture ......... '....... ........ 177 



Loss on ignition ................. ................ ' 7*03 



"Doddridge-Harrison Report, W. Va. G. S., p. 240; 1912. 



