2 20 Sheppard : Yorkshire Naturalists at B rough. 



be accounted for by the manner in which the district has been 

 worked recently by the local societies. Nevertheless, the excur- 

 sion was a most enjoyable and certainly a profitable one. The 

 glorious weather which prevailed was very acceptable, though 

 to the bryologists and others the recent warm weather was not 

 of the most favourable from their point of view. 



The Geological Section (about thirty members) commenced 

 operations at North Ferriby, and was under the guidance of 

 Mr. J. W. Stather, F.G.S., and the writer. The interesting 

 section known as ' Red Cliff,'* on the north bank of the Humber, 

 was first visited. This is perhaps one of the finest sections in 

 a terminal moraine to be met with in the north of England, 

 inasmuch as a complete transverse section is visible, showing 

 the general shape of the mound, as well as its structure and 

 contents. A very similar exposure occurs on the opposite bank 

 of the Humber at South Ferriby, and doubtless at one time the 

 moraine stretched across the estuary, and would have some 

 influence upon the drainage. As the British Association Erratic 

 Blocks Committee, the Yorkshire Boulder Committee, and the 

 East Riding Boulder Committee were well represented on this 

 excursion, it is only natural that much attention was paid 

 to the Scandinavian, Lake District, and other rocks, which 

 occur in the Boulder-clay at this point. The following 

 boulders were noted, and the identification of each confirmed 

 by Mr. Kendall : — 



Rhomb-porphyry. From Scandinavia. 



Augite-syenite (Laurvikite). From Scandinavia. 



Porphyrite. From Dalecarlia, Scandinavia. 



Garnetiferous schist. From Scandinavia (probably). 



Porphyrite. From the Cheviots. 



Armboth Dyke (?). Lake District. 



Greywacke 



Jaspar. 



Lidianstone. 



Carboniferous Limestone. From Teesdale. 

 Magnesian Limestone. From Roker (Sunderland). 

 Liassic fossils. From Whitby. 

 Gryphcea dilatata (Kimmeridge Clay). 

 Pink flint. 



*For an account of this and other sections in the district reference 

 should be made to a paper, ' Geology of the neighbourhood of Brough, 

 East Yorkshire" (with Bibliography), by the present writer, which appeared 



in 'The Naturalist' for May 1901, pp. 129-144. 



Naturalist, 



