79 



THE YORKSHIRE BOULDER COMMITTEE 

 AND ITS EIGHTEENTH YEAR'S WORK, 1903-4. 



PERCY F. KENDALL. F.G.S., Chairmnn, 



AND 



H. HOWARTPL F.G.S., Hon. Secretary. 



The records during- the year are less numerous than usual, but 

 the Committee now only wish reporting- erratics from new areas 

 or localities, or such as add support to previous records from 

 places where erratics are scarce, or new rocks altog-ether. 



The rocks reported by Mr. Kendall from Norfolk are 

 appended to this report because they indicate the extended 

 distribution of erratics familiar to Yorkshire recorders. They 

 are further of much interest to us as a number of them were 

 identified by Professor Sjogren and Professor Backstrom, of 

 Stockholm, as of Scandinavian origin. 



These rocks included a cancrinite-syenite from Sarna in 

 Dalecarlia, Sweden ; quartz porphyry, also from Dalecarlia ; 

 a fine-grained granitic rock which is a common and wide- 

 spread type in Sweden ; sparagmite conglomerate from Scania ; 

 sparagmite sandstone and a series of hornblende-porphyrites 

 from the Christiania districts. 



Reported hy E. Hawkesworth. 



Brompton and Osmotherley. 



Between Brompton and Osmotherley, three miles N.E. of 

 Northallerton, in sandy clay exposed in altering road. Whin 

 Sill, Shap granite. Lake District Volcanic Series (several 

 varieties), Carboniferous limestones and sandstones numerous. 

 Chert. 



HULL GEOLOGICAL SOCIETY. 

 BOULDER COMMITTEE. 

 Reported hy G. W. B. Mactl rk. 



Raywell, near Hull. 



In connection with the making of the new reservoir at Ray- 

 well a section has been exposed consisting- of Boulder Clay, 

 ID feet thick, resting on Chalk, 230 feet O.D. The boulder 

 clay appears to be in two divisions, a red upper clay and a blue 

 or lead-coloured lower clay. Among the erratics the following 

 were recognised : — Carboniferous Limestone, Canister, Porphy- 

 rite, Greywacke, Basalt, etc. 



1905 March i. 



