STRATIGRAPHY OF FOSSILIFEROUS MEMBERS 51 



Feet Inches 



Covered 9 



Coal, cannel __ 6 



Covered 1 6 



Shaft 97 



Coal ; Quakertown or No. 2 3 



A small collection of fossils was made: 



Crinoid segments 



Rhombopora lepidodendroidea Meek 



Derbya crassa (Meek and Hayden) 



Chonetes fnesolobus Norwood and Pratten 



Productus cora d'Orbigny 



Productus semireticulatus (Martin) 



Pustula nebraskensis (Owen) 



Marginifera muricata var. missouriensis Girty 



Marginifera wabashensis (Norwood and Pratten) 



Spirifer boonensis Swallow? 



Squamularia perplexa (McChesney) 



Composita subtilita (Hall) 



Astartella concentrica (Conrad) 



Eossils were collected in Section 18, Milton Township, from ex- 

 posures of Lower Mercer limestone in the private lane near the level 

 of the Baltimore & Ohio Southwestern Railroad, Portsmouth Branch, 

 just north of Hoganville School (Locality 32). The geologic section 

 here follows: 1 



Feet Inches 



Allegheny formation: 



Limestone, flinty, Vanport 3 



Shale, black, fissile 2 



Coal and partings, Clarion 4 



Clay and covered 13 



Pottsville formation: 



Sandstone 9 



Covered 10 



Sandstone 12 



Shale . 1 6 



Ore, Upper Mercer __ 3 



Clay, light 1 3 



Sandstone 1 -.' 



Covered ._ _ 5 



Ore, Sand Block .. 4 



Sandstone, ferruginous -- 8 



Sandstone, soft 10 



Co vered 5 



Sandstone 11 



Clay, light ._- 2 



'Stout, W., Geol. Surv. Ohio, Fourth Ser., Bull. 20, p. 150, 1916. 



