22 



Stanton and Yaughan — Section of the 



taensis and Nodosaria texana. e. 

 with Cyprimeria. e. Sandy layer. 



Sandstone, white, yellow, 

 or brownish, with shale 

 beds 200 ft. ± 



Clay shales, with bands of 

 limestone nodules, contain- 

 ing great numbers of a 

 large Exogyra 40 ft. 



Hard limestone with the 

 same species of Exogyra 



in the top 15 ft. 



Sandstone, white or brown, 30 ft. + 

 Upper part of the bed, clay 

 shales alternating with 

 brown sandy flags. 



Brown sandy calcareous 

 layers at base, containing 

 Gryphcea washitaensis Hill 

 and Nodosaria texana in 

 great abundance. 



The G. ivashitaensis is 

 confined to base. 30 ft. 

 above the base, Ostrea 

 subovata. Ostrea quadri- 

 plicate Shum. very abund- 

 ant between 30 and 40 ft. 

 40 ft. above base zone of 



Kingena wacoensis 60 ft. 



Flaggy argillaceous lime- 

 stone, with shale partings. 

 Layer of sandy flags at 

 base. In the sandy flags, 

 Cyprimeria. In the lime- 

 stone bands Schloenbachia 

 leonensis, Gryphwa washi- 

 taensis, Protocardia, Tri- 

 gonia emoryi. The zone 

 of G. washitaensis is at the 



top . . . 1 00 ft. 



Clay shales, with indurated 

 calcareous bands. No fos- 

 sils were found 125 ft. 



Ledges of hard limestone. 

 Fossils not numerous ; at 

 the base, there is a con- 

 siderable number of an 

 undetermined species of 

 Gryphcea, Gryphaza tucum- 

 carii, JVeithea, and Schloen- 

 bachia 25 ft. 



Kingena wacoensis, Ostrea quadriplicata, 

 Ostrea subovata. b. Gryphcea washi- 

 Gryphcea ivashitaensis. d. Sandy layer 



