8 PROCEEDINGS OE THE GEOLOGICAL SOCIETY. [Apr. 6, 



The Cephalopoda- or Jurensis-bed. ( Upper Lias.) 



ft. in. 



D. A brown marly rock, full of small, dark, oolitic grains 



of the hydrate of iron, which are strewed in pro- 

 fusion in a calcareous paste. About 2 



D\ A thin seam of yellowish sand 1-| 



E. A dark-grey crystalline limestone, extremely hard, 



and resembling some beds of the Carboniferous 

 Limestone ; it is bored in different places by Fistu- 

 lana, the shells of which remain in the excava- 

 tions 9 



F. A brown argillaceous sandy bed, full of micaceous 



particles, passing downwards into fine brown and 

 yellow sands. Thickness unknown. 



G. Upper Lias Clay, of a dark-blue colour. Thickness 



probably 160 



Section II. — Crickley Hill, near Cheltenham. 



The Freestone forms a fine bold mural escarpment in this hill, but 

 it is not much worked for building. 



The Pea-grit, which is extremely well developed, is extensively 

 extracted for road-material. It admits of the following subdivi- 

 sion : — 



A. A coarse oolitic limestone, with large grains and nu- 



merous concretionary bodies, extremely hard and 

 crystalline in parts 25 



B. A coarse pisolitic limestone, composed of flattened 



concretionary bodies, which are round, oval, or 

 flattened, like crushed peas 20 



C. A coarse brown rock, very ferruginous, and full of 



large oolitic grains 10 



Section III. — At Beacon Hill, near the Horsepools. 



A. A close-grained freestone, resembling the equivalent 



bed at Leckhampton, but becoming flaggy in its 



upper part 15 



A v . A close-grained yellow oolitic limestone, quarried for 

 road-material, much speckled with dendritical 

 patches of the peroxide of iron, and containing few 

 fossils. It measures 12 



B. A yellowish sandy rock, separating into large blocks, 



which contain fossiliferoiis nodules ; the fossils in 

 general are well preserved. It is not used for any 

 economic purpose ; and heaps of blocks lie close 

 together by the brown micaceous sauds 1 8 



C. A brown sandy oolite, passing into a coarse ferru- 



ginous oolite; containing many fossils not well 

 preserved : oolitic grains of the hydrate of iron are 

 scattered through the brown calcareous matrix. It 

 measures from 8 to 10 



