1856.] 



WRIGHT UPPER LIAS SANDS. 



295 



Section I. — Leckhampton Hill, near Cheltenham. 



Nos. 1 and 2 form the upper ragstones, consisting of the *' Tri- 

 gonia-grit" (No. 1), and the " Gryphaea-grit " (No. 2). 



No. 1. The Trigonia-bed is a coarse brown ragstone, containing 

 many impressions of Trigonia costata. Sow., T. decorata^ Lye, 

 liima cardiiformisy Sow., Rhynchonella concinna. Sow., Ammonites 



Fig. 1. — Section through Leckhampton Hill, near Cheltenham. 



Leckhampton HilL 



1.5 



A, B, C. 

 D. 



E, F, 6. 



1. Trigonia-bed. 



2. Gryphaea-bed. 



3. Brown rubbly oolite. 



4. Flaggy freestone. 



5. Fimbria-bed or oolite-marl. 



6. Freestone. 



A, B, c. Pea-grit and ferruginous oolite. 



D. Cephalopoda-bed. 

 E, F, G. Upper Lias sand and Upper Lias clay. 



H. Marlstone. 

 I. Lower Lias clay. 



Parkinsoni, Sow., Uchinobrissus clunicularis, Lhywdd, Holectypus 

 depressus, Leske, and Clypeus sinuatus^ Leske; in thickness it is 

 about 7 feet. 



No. 2. The Gryphcea-hed is an ancient oyster-bank, and is com- 

 posed in great part of Qryphcea Buckmani, Lye, with many other 

 shells, as Myacites dilatata. Buck., Terebratula impressa, v. Buch, 

 Tancredia donaciformis, Lye, Gervillia tortuosa, Phil., Lutraria 

 ovalis ?, Phil., Cypricardia cordiformis, Desh., Ammonites Mur- 

 chisonce, Sow., and many other shells ; but the dominant shell is the 

 Gryphcea : this bed is about 8 feet in thickness. 



No. 3. A coarse, brown, shelly, rubbly oolite, well exposed to the 

 east of Leckhampton Hill, where it forms a mural cliff; and between 

 the inclined planes at the Leckhampton quarries it contains many 

 fossils ; but, as the bed is not in general quarried, they cannot be 

 extracted : it is about 24 feet thick. 



No. 4. Upper flaggy bastard-freestone, well seen above the oohte- 

 marl : 26 feet thick. 



No. 5. The Oolite-marl or Fimbria-bed, is a cream-coloured mud- 

 stone, not unlike chalk-marl ; the dominant shell is Terebratula fim- 

 bria, Sow. ; but it contains likewise Lucina lyrata, Phil., Lima 



