10 PKOCEEDINGS OF THE GEOLOGICAL SOCIETY. [Apr. 6, 



Inferior Oolite. 



ft. in. 



A. The limestones of the Inferior Oolite, which form an 



excellent freestone, very similar to the same rock 

 at Birdlip, Frocester, Painswick, and Leckhamp- 

 ton, have a thickness of 80 



B. Is not well exposed in this section ; the Inferior 



Oolite limestone quarry is about half a mile from 

 the section of the lower beds ; and the intervening- 

 escarpment is covered by vegetation. 



C. Is represented by a yellow, loose, rubbly oolite, rest- 



ing on the Cephalopoda-bed ; it contains Ammonites, 

 other shells, and Serpula. 



The Cephalopoda- or Jur ends-bed. 



D. A hard, brown, coarse, ferruginous oolitic sandy 



limestone, speckled with flattened grains of hydrate 

 of iron ; the hard sandy bands are interstratified 

 with softer sand, which contains many fossils and 

 passes into 

 D 1 . A coarse oolitic rock, not so ferruginous as the upper 

 division, but with fossils of the same species ; pass- 

 ing into thin bands of a ferruginous oolite like D. 



E. A coarse oolitic rock, similar to D 1 ; the same bed 



occurs at Ozleworth and Sudbury. These three 



beds measure about 16 6 



F. The Upper Lias Sands are yellow and micaceous; they 



contain inconstant and irregular layers of hard, 

 sandy, lenticular concretions, some of which are 

 fossiliferous. These sands measure 123 



Tipper Lias. 



G. The Upper Lias Clay is very thin, and contains no- 



dules of limestone at the top ; it nearly thins out 



here, as its thickness is only 10 



Middle Lias. 



H. The upper bed of the Marlstone is a hard, brown, 

 calcareous sandstone, which forms the capping of 

 the Marlstone terrace 12 



H 1 . The Marlstone is well developed, and consists of fox- 

 coloured sandstone, more or less ferruginous, with 

 grey, impure sandy limestone, containing oolitic 

 grains 186 



Lower Lias. 



I. The Lower Lias shales and limestones ; thickness un- 

 known. 



The preceding sections exhibit the lithological character and 

 stratigraphical relations of the pea-grit and freestones, which, how- 



