496 PEOF, E.J. GARWOOD ON" THE LOWER CARBONIFEROITS [DeC. I9I2,. 



The Pinskey-Gill Beds. — These beds are named from their 

 occurrence in Pinskey Gill, a mile south of Pavenstonedale Station. 

 They are first seen about 150 yards down stream from the eastern- 

 most outcrop of the Bannisdale Slates. The lowest beds consist of 

 a fine-grained, grey and yellow, banded sandstone, about a foot 

 thick, containing conspicuous black specks. Immediately above this- 

 sandstone lies a bed of gritty, dun-coloured, calcareous mudstone 

 having the following; percentage composition : — 



CaCOg 69-96 



MgCOa 8-84 



Fe^O,, etc 4-47 



Insoluble residue 16"73 



Total 10000 



The bed shows little or no trace of lamination, and breaks in to- 

 small irregular blocks. Occasionally, it encloses thin lenticular 

 pebbles measuring up to 2 inches ii] diameter, composed of a finer 

 material which resembles a volcanic ash : these pebbles are fre- 

 quently coated with a thick layer of pyrite. A few small quartz- 

 pebbles also occur. The bulk of the insoluble material is composed 

 of sand-grains, and although search has been made for fragmeiits 

 of Shap-Granite felspar-crystals, which occur so abundantly in the 

 overlying conglomerate, no trace of these has been discovered. 

 The bed has yielded fossils in fair abundance, but only in the form 

 of casts — with the exception of specimens of Liiigula and Orhicu- 

 loidea, in which the shell is still preserved. 



Fauna. 



Fenestella sp. 



Livgula cf. squamiformis Pliill. 

 Orhmdoidea sp. 



Athyris, between glahristria (PbilL) 

 and conceiiirica Von Buck. 



Bhynchovella sp. 



SinriJ'er pinskeyevsis, sp. nov. 



Fsephcd'us sp.^ 



This sandstone is overlain by dark sandy shales, which have only 

 yielded casts of lamellibranchs. 



Parther down the stream higher beds are exposed, consisting of 

 compact mudstones interstratified with shales. These have yielded 

 the following fossils : — 



'& 



Lingula cf, sqiiamiformis rhill, 



Aviculopecten, 2 spp. 

 (!) Myalina sp. 



PosidonieUa sp. 

 Naticopsis sp. 

 Psephodus sp.'- 



On the right bank a small cliff-section exposes flaggy and shaly 

 beds, containing worm-tracks and plant-remains which are referable 



^ Kindly determined by Dr. A. Smith Woodward, F.E.S, 



