OF KOKTH OXEOBDSHIEE AND THE CEYPETTS-GKRIT. 225 



Oolite may be represented in time by the Upper Estuarine series 

 locally known as Upper Shale and Sandstone. 



The Cotteswolds. — As one travels eastwards from the neighbourhood 

 of Cheltenham, the gradual attenuation of the lower Bajocian deposits 

 of the Cotteswolds, so well illustrated in the works of Drs. Lycett, 

 Wright, Holl, and Professor Hull, is admirably shown in the sections 

 exposed in the new Banbury and Cheltenham Railway. One imme- 

 diately loses sight of the Pea-Grits of Leckhampton Hill ; and though 

 at JNotgrove station the Oolite Marl is well represented and fossili- 

 ferous, yet two miles nearer Bourton-on-the- Water only a thin seam 

 of marl containing old and separated valves of Terebratula fimbria, 

 and a few feet of very oolitic limestones of doubtful relationship, are to 

 be seen beneath the bored bed at the top of the Upper Freestones. 

 Old specimens of T. fimbria also occur in a hillside freestone quarry 

 on the road from Bourton to Eyeford, though no trace of the marl 

 is there apparent. 



At Bourton the rocks are strangely broken ; and in the railway- 

 section nearest the station, tumbled masses of Clypeus-grit are to be 

 seen resting upon the Upper Lias with the intervention of merely 

 a few feet of (crinoidal) limestone and sand. The Clypeus-grit shows 

 thereabouts no trace of that attenuation which characterizes the lower 

 horizons of the Inferior Oolite — a fact well illustrated in a section 

 about 1| mile east of Notgrove, where I have made the following 

 measurements : — 



ft. in. 



Clypeus-grit, a rubbly brown oolitic limestone with 

 Homomya gibhosa, Amm. Parkinsoni, Ter. globata, 

 &c. ; top not shown 36 



Freestone bored by Annelida ; base not shown 7 



It will be worth while here also to note an interesting develop- 

 ment of sandy limestones between the Clypeus-grit and the Fuller's 

 Earth. These are shown in a cutting about midway between 

 Bourton and Notgrove, east of the Harford-road Bridge. 



ft. in. 



1. Humus 1 



2. Fuller's Earth, yellow and blue clays with a thin 



rock-bed 20 



3. Red sand derived from decomposition of No. 4. 1 2 



4. Reddish sandy limestone with plant-remains... 6 6 



5. Dark blue clay with ferruginous stains and 



plant-remains 1 



6. Rubbly oolite (Clypeus-grit) with Clypeus Plottii, 

 Anabacia, &c. ; base not shown 5 



At the base of the Fuller's Earth a course of water worn lime- 

 stone nodules, often coated with Serpulce, yield Trigonia producta, 

 Terebratula globata, Nerinoea sp. and corals. 



Near Stow-on-the-Wold the lower beds of the ParJcinsoni-zone 

 rest upon a bed of freestone containing numerous joints of Penta- 

 crinites, fragments of Echinoderms, and Polyzoa of the genera 



