XYl.— Geological Observations on Part of Gloucestershire and Somersetshire. 

 By THOMAS WEAVER, Esq., 



MEMBER OF THE ROYAL IRISH ACADEMY, AND OF THE WERNERIAN AND GEOLOGICAL 



SOCIETIES. 



[Read 4th June, 1819.] 



CONTENTS. 



Introduction, §§ 1 — 3. 



I. Environs of Tortworth. 



General view — Secondary formations, §§ 4 — 7 



1. Transition tract, §§ 8 — 13, 



2. Floetz or sedimentary tracts, §§ ] 6 — 30. 



a. Carboniferous series, §§ 1 6 — 24. 



Old red sandstone, § 17. 

 Carboniferous limestone, § 20. 

 Coal formation, § 24. 



b. Gypseous and saliferous series, §§ 25 — ^27. 



Calcareous conglomerate, } ^ aa 

 Magnesian limestone, ) 

 New red sandstone, § 27. 



c. Third sedimentary series, §§ 28 — 30. 



Lias, § 29. 

 Oolite, § 30. 



II. North-west of Gloucestershire, etc. 



General relations, §§ 31 — 37. 



III. North-west of Somersetshire. 



General relations, §§ 38 — 49. 



Introduction. 



§ 1. J. HE tract included in the view from the northern brow of the hill, on 

 which stands the rectory of Tortworth, is no less calculated to gratify a taste 

 for the picturesque than to excite a lively interest by its geological structure. 

 The rich and beautiful vale of the Severn, diversified by gentle inequalities, is 

 bounded on the east by a bold abrupt escarpment of oolite, from which Stinch- 

 combe-hill projects far out into the vale. In the distance, to the north, ap- 

 pears the Malvern chain of hills, flanked on the west by the Doghill range. 



