Yol. 51.] 



OF THE MID-COTTESWOLDS. 



395 



ft. in8. 



ft. ins. 



1 11 



Lower Tri- 5. Earthy parting, overlying a bed 



gonia-grit. similar to the above, but less fossili- 



ferousand somewhat conglomeratic. 



Some broken lamellibranch-shells. 



Upper Free- 6. Shelly, oolitic, cream-coloured lime- 

 stone, stone ; flat top, with oysters ; slightly 

 bored vertically. 



Here a deposit nearly 3| feet thick separates the Upper Trigonia- 

 grit from the Upper Freestone — a fairly rapid increase from \\ 

 inches in half-a-mile. This deposit has usually been known as 

 Gryphite-grit on the authority of Witchell, 1 and of Lycett 2 ; but 

 Wright 3 gave the lower foot as ' Lower Trigonia-grit,' and the 

 rest as ' Gryphite-grit.' Both Lycett and Witchell, however, speak 

 of the Lower Trigonia-grit as being absent from the Stroud area, 

 and only developed in the Cheltenham district. 



The two foregoing sections are really on the northern edge of what 

 has been defined above (p. 389) as the Southern Cotteswolds. The 

 next section begins the Mid-Cotteswolds ; it lies across the valley, 

 and shows that the above-mentioned gap is filled up to a certain 

 extent, while the thickness of the ' intervening beds ' increases very 

 rapidly. 



Section III.- 

 E.S.E. 



Clypeus-grit. 



Upper Tri- 

 gonia-gvit. 



-Stroud Hill, hy the Worlchouse. (From Stroud, 4 | mile 

 from Leckhampton Hill, 3 9| miles S.W. by S.) 



1 . Yellowish limestone somewhat broken 



up, partly on account of proximity 

 to surface 



2. A somewhat purplish, iron-shot, 



rather soft, shelly stone, bored 

 at the top. Impressions of Tri- 

 gonicB, also of Parkinsonia cf. 

 Garantiana, Bhynchonella sub- 

 tetrahedra. (This is on the horizon 

 of Witchell's coral-bed 6 ; but I 

 found no corals.) 1 



3. Hard grey limestone, with masses of 



brachiopoda ; these are particularly 

 well preserved in the partings, and 

 where the bed is weathered. Tere- 

 bratula globata, Zeilleria Hughesi 

 (Walker), Aulacothyris carinata 

 (Lamarck), Bhynchonella subtetra- 

 hedra, Davidson, Acanthothyris 

 spinosa (Linn.) 5 



ft. ins. 



ft. ins. 

 6 9 



7 



' Geology of Stroud,' 1882, p. 55. 



' Cotteswold Hills,' 1857, p. 63. 



' Inf. Oolite,' Quart. Journ. Geol. Soc. vol. xvi. (1860) p. 44. 



The church iB taken as the centre. 5 The Gamp. 



' Geology of Stroud,' p. 60 and section facing p. 5. 



