336 Mr. Weaver's Geological Observations on 



5. Trap, about one fourth of the thickness of No. 1. 



6. Limestone, sandstone, and slate clay, in alternating- beds, the first pre- 

 dominating, and the whole forming a body about 200 yards in width. These 

 beds dip to the south at angles varying from 25° to 60°, but are inflected 

 towards the Avon and Falfield valleys^ dipping in the former to the west 

 of south, and in the latter to the east of south. 



7. From hence to Cinderford bridge, a distance of about 300 yards, the 

 sandstone and slate-clay principally appear, dipping toward the south. 



Trap becomes again visible on the south-west, and may be followed for 

 some space in Daniel's wood, where it probably ceases, as the stratified 

 transition beds may be traced almost continuously across the vale of Falfield 

 up the escarpment of Tortworth hill, nearly to their junction with the old 

 red sandstone. 



§ 15. The left bank of the stream of Falfield is marked by a curvilinear 

 ridge of transition trap, which extends from Skeay's grove past Falfield and 

 Whitefield, to the head of the valley, being there joined by the north-western 

 projection of the old red sandstone of Milbury heath, thus closing and sepa- 

 rating this vale from that of Thornbury. In the transition series west of the 

 ridge near Falfield, beds of sandstone predominate, dipping at an high angle 

 toward the south-east; but nearer toward Sunday's hill, they approach the 

 vertical position, and then incline at a considerable angle toward the north- 

 west. The transition beds therefore appear to constitute in this quarter an 

 arched inflection, broken at the surface. 



In the brow of the ridge near Falfield itself, the limestone beds prevail, and 

 apparently also in the greater part of the vale ; e. g. in the small eminence 

 situated between Falfield bridge and the north-western extremity of Tortworth 

 Park, where they dip generally toward the south-east, at an angle of 40° : 

 but in Barber's quarry they are partially inflected, dipping to the east 15° 

 north ; the upper strata there consisting, to the depth of ten feet, of common 

 limestone, and the lower of loosely coherent masses, partly composed of sandy 

 magnesian limestone, with cavities lined by crystals of calcareous spar, and 

 connected by marly clay. 



In Skeay's Grove, the beds dip 20° to the east, 25° south ; in Falfield 

 quarries, from 42° to 55° to the south-east, being gently undulated both in 

 the line of range and dip. In the north-eastern quarry, they succeed each 

 other thus : — 



1. At top, limestone with some slate-clay . 3 feet thick. 



2. Marly slate clay, with interrupted layers of limestone 5 



