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THE YORKSHIRE BOULDER COMMITTEE 

 AND ITS FIFTEENTH YEAR'S WORK, 1900 1901. 



PERCY F. KENDALL, F.G.S., Leeds, Chairman, 



AND 



J. H. HOWARTH, F.G.S., Halifax, Hon. Secretary. 



In furtherance of the objects of the Committee an excursion to 

 the Lake District was arranged by the Yorkshire Geological and 

 Polytechnic Society. The area chosen for study was the country 

 round Keswick, which is so rich in rocks of pronounced peno- 

 logical characters which might be expected to have travelled over 

 into Yorkshire. The influence of this excursion is at once to be 

 seen in the records of ' erratics ' which have already been 

 recognised. The peculiar rocks of Eycott Hill and Carrock Fell 

 have been found at Dimlington, and a well characterised volcanic 

 breccia occurring as boulders on Dunmail Raise has been found 

 at Hornsea, along with a specimen of the well-known Armboth 

 Dyke. 



A striated surface discovered on the southern slope of 

 Skiddaw has been reported to the Committee as the only 

 convenient method of recording an isolated but valuable 

 observation. 



The reports from the coast tract of Yorkshire continue to 

 yield new stations for the very characteristic Norwegian rhomb- 

 porphyries and elasolite-syenites. The visit paid by the geologists 

 of Yorkshire to the Cheviots and some of its results were 

 commented upon in the last report of this Committee. Two 

 facts stand out in the present series of records, in the light 

 of a more intimate acquaintance with the Cheviot rocks. While 

 we find that many observers note the great preponderance of 

 Cheviot porphyrites over every other type of far-travelled stones, 

 no example of the Cheviot granite has ever been identified in 

 Yorkshire. The Chairman has long been impressed with the 

 singularity of this absence of evidence, and after examining the 

 rock in situ has made careful search for it at Filey, Bridlington, 

 Whitby, and other places, where the porphyrites abound. No 

 clearly identifiable specimen could be found. A collection was 

 made of granitic pebbles from the shore at Whitby in order to 

 get a sufficient series to base an opinion upon. Seventy of these 

 stones have been sliced, and the results of a preliminary 

 examination are not encouraging to the hope that any positive 

 identification of the Cheviot granite can be made. The results 



1902 July 1. 



