﻿Yol. 64.] THE FOSSILIFEROTJS SIHJRIAN- KOCKS OF TORTWORTH. 527 



(4) ' Rubbly red, sandy, calcareous beds. 



(3) Thin, irregularly bedded, almost lenticular masses of purple and grey 

 limestone, passing down into ash-coloured shale, with very thin 

 courses of greyish-blue limestone, the shale being loaded witb many 

 of the corals and encrinites peculiar to the Wenlock Limestone. . . . 



(2) Purple and grey strong-bedded limestone, 20 to 30 feet thick, highly 

 charged with encrinites, and the beds separated by courses of red 

 shale. 



(1) Eed and green schistose beds, passing down into hard purple sand- 

 stone and grit.' 



It is now verj^ difficult to obtain fossils here ; but the locality is 

 a well-known one, and in former times numerous fossils were to 

 be found. 



North of Falfield water-mill the limestone-band continues to be 

 well marked, and bears several small disused pits. Sandy limestone 

 dipping at 40° S. 30° E. is exposed at the southern end of Heneage 

 Court, and here we found 



Favositella interpunctata. 

 Atrypa reticularis. 

 Ehynchonella diodonta. 



Natico])sis sp. 

 Phacops caudatus. 

 Calymene Bliimenhachi. 



The band can be followed right through Skeay's Grove, and is well 

 exposed at the northern end, where shaly partings separate beds of 

 limestone about 15 inches thick. Cyathophyllum (?) was found, but 

 fossils (with the exception of indeterminable crinoids) were scarce. 

 The rock dips eastwards at 22°. Weaver ^ gives details of a section 

 about 25 feet thick at Skeay's Grove. 



A ridge marked by a series of small overgrown pits shows the 

 extension of the limestone for over 300 yards to the north of 

 Skeay's Grove ; but then it dies out, and there is no evidence of its 

 occurrence north of Oldbrook Farm. 



The upper or eastern limestone-band is neither so well marked 

 nor so continuous as the western. Commencing at the southern 

 end, the first trace is at a point south of Little Whitfield Farm, 

 where numerous blocks of red limestone are strewn over the fields. 

 Thence it stretches to Brinkmarsh Farm, whence a prominent 

 ridge extends in a north-north-easterly direction for about a quarter 

 of a mile. Blocks of limestone from Brinkmarsh Farm were found 

 to contain Orthis elegantula, Atrypa reticularis, and Leptcena rliom- 

 hoidalis in some abundance. 



Mr. Hudson, of Brinkmarsh Farm, has recently sunk a series 

 of shallow pits in search of celestine, along the southern margin of 

 the large field to the north of the farm. From the westernmost 

 hole lying nearly due north of the farm, shale and red and green 

 grit were obtained, together with a good deal of celestine in blocks, 

 one measuring 18x8x6 inches. The second hole showed the 

 same material, with celestine in smaller quantities ; a third and 

 fourth farther east, and lying respectively north and south of 

 the hedge, were in highly-fossiliferous thinly-bedded Wenlock 



1 Trans. Geol. Soc. ser. 2, vol. i, pt. ii (1824) p. 336, quoted in Mem. Geol. 

 Surv. ' East Somerset & Bristol Coalfields ' 1876, p. 10. 



