158 STRATIGRAPHY THE CONEMAUGH SERIES. 



Feet. 



Sandstone, coarse, Buffalo - 



Shale, sandy 10 



Shale, dark gray, with crinoid stems at base, Brush 



Creek 10 



Coal, (0' 2"), Brush Creek, (1245' B.) 



Shale, limy, ferriferous 15 



Sandstone, massive, to grade, Mahoning 20 



Plate XXI shows another exposure % mile east of Jewell. 

 The following exposure w r as noted in Banks District, Up- 

 shur, on the head of Whites Camp F'ork, 0.5 mile southwest 

 of Beverage Knob and 1.5 miles south of Boyd : 



Feet. 



Sandstone, massive, Buffalo, 40' to 50 



Shale, dark, very fossiliferous at base, Brush Creek, 



(1620' B.) 15 



Concealed in run 



A further description, containing a discussion of the fos- 

 sil forms found in this horizon, by Dr. Price, will be found in 

 Chapter XIII. 



THE BRUSH CREEK COAL. 



The Brush Creek Coal of White 23 , belonging directly 

 under the Brush Creek Limestone and Shale, occurs frequent- 

 ly along the eastern edge of Collins Settlement District, Lewis. 

 It is a thin seam, usually less than one foot thick, and has no 

 economic importance. This coal is well exposed -along the 

 Coal and Coke Railway grade, within the limits mentioned 

 for the Brush Creek Shale above. The section published for 

 Jewell in Chapter IV shows its position in the measures. 



THE MAHONING SANDSTONES. 



The Mahoning Sandstones of H. D. Rogers and White 2 *, 

 occurring between the Brush Creek and Upper Freeport Coals, 

 sometimes being consolidated into one great ledge 50 to 80 

 feet thick, but often being separated into two cliffs, with an 

 intervening coal and fire clay, are exposed along the eastern 

 edge of Collins Settlement District, Lewis. They are usually 



"I. C. White, Report Q. Sec. Geol. Sur. of Penna 

 M I. C. White, Vol. II, W. Va. G. S., p. 305; 1903. 



