334 SHEPPARD : SHAP GRANITE, ETC., IN LINCOLNSHIRE. 



•clay of Wood and Rome,* being of a very red colour, blue-jointed 

 in places, and containing only a few pebbles (including rhomb- 

 porphyry). Large boulders are only rarely found in this upper clay. 

 In both deposits pebbles, generally of carboniferous limestone, are 

 often found beautifully ice-scratched, and sometimes even polished. 



On the opposite side of the Humber, at North Ferriby, is a 

 precisely similar deposit, about the same size as the bed at South 

 Ferriby, containing similar boulders (though in far greater number 

 and variety), and composed of similar beds of Boulder Clay, etc. 

 These sections have recently been fully described by Mr. J. W. 

 Stather, F.G.S.** Both Mr. Stather and the writer have found 

 boulders of Shap Granite here. 



The Rev. W. Tuckwell tells me he has lately found a block of 

 Shap Granite measuring i foot by i foot, by r foot 6 inches, at Irby, 

 near Laceby, North Lincolnshire. It was ' taken out of an old 

 Saxon wall, 7 and is ■ hollowed into quern-like depressions on three 

 sides. 5 Of course there is no knowing from where this boulder may 

 have been carted, along with other stones, to build the wall with. 



Mr. Parrish also has seen a boulder at Yarborough, measuring 

 about 5 feet by 3 feet, which he thinks may possibly be Shap Granite, 

 though he is not certain about it. I should be glad if any reader ot 

 this note who lives in the vicinity, or who happens to be passing 

 would chip a piece off the boulder (the larger the piece the better) 

 and send it either to Mr. Tuckwell or myself, together with exact 

 measurements, etc., as, if it proves to be Shap Granite, it will be the 

 largest boulder of that rock found in Lincolnshire. 



Mr. Clement Reid, F.G.S., in his ■ Geology of Holderness,' 1885, 

 page 35, refers to a boulder of Shap Granite which he found on the 

 beach near Dimlington, and which up to that time was ' the furthest 

 point to the south-east to which Shap Granite had yet been traced.' 

 Later, Mr. John Cordeaux records a boulder of this rock at Kilnsea 

 near Spurn. f This is now in the garden of Mr. H. B. Hewetson, 

 at Easington. 



Inland, at Royston near Barnsley, which is just south of the line 

 of the Humber, this granite has been found, || and Messrs. Corbett 

 and Kendall report a boulder at Balby near Doncaster ; X this and 

 the Barton, South Ferriby, and Irby specimens described above, are 

 the only records that I know of for the country immediately south 

 of the Humber. 



* Quart. Journ. GeoL Soc, vol. xxiv, p. 146. 



** In a paper read to the Yorks. Geo!. Soc. at Whitby, July, 1S96. 

 f s The Naturalist,' 1S89, p. 355. 



Mackintosh. GeoL Mag., 1871, p. 312, 

 X Report of Brit. Assn. Committee on Erratic Blocks, 1896. 



Nature *«i 



