XIV 



Page 154. — Woodcut. Later observations made at this quarry, which has been extended, give 

 the following section : 



A< 



.'he section in the quarry at Congletou Edge, 



where the Dithyrocaris and Ceratiocaris 

 marked A*. 



ere found in the strata 



At the top. Grey-yellow clay, with blocks of grit : to 5 feet. 



Decomposed limestone, crowded with crushed shells of Orthis resupinata : 5 ft. 2 in. 



Grit : 1 foot. 



Grey shales: 3 feet. 



Shale with half-inch bullions : 9 inches. 



Very sandy shales : 2 to 4 inches. 



Shale with slightly calcareous bullions ; marine fossils : 5 ft. 7 in. 



Rather darker shale, with two lines of bullions : 3 feet. 1 



Calcareous shales with Goniatites : 8 inches. 



Rather darker coarsely laminated, shales, with Glyphioceras spirale, Posidoniella Ixvis, 

 and plant remains : 1 foot. 



Shale with calcareous bullions and marine fossils : 4 feet. 



Coal : | inch. 

 ' Gannister grit with plant remains : 5 ft. 8 in. 



Flaggy grit with thin black shale partings : 2 feet. 



Shale : 3 to 4 inches. 



Grit (Gannister) : 1 ft. 6 in. to 2 feet. 



Shale and thin grits : 1 ft. to 1 ft. G in. 



Grit (Gannister) : 5 ft. 6 in. 



Shale much squeezed: 2 feet. 



Grit : 1 foot. 



Coal : \ inch. 



Grit (Gannister) with plant remains : 11 feet. 



Shale with many plants : 3 inches. 



Grit : 1 foot. 



Shale: 4 ft. G in. 



Grit (Gannister) : 3 ft. G in. 

 This ia the horizon at which Dithyrocaris testudinea and Ceratiocaris Oretonensis were found. 



