Yorkshire Boulder Committee : Fifteenth Year's Work. 213 



Don Valley. These do not dip towards the Don, but towards 

 the Trent. Just outside the boundary of the map, near Bawtry, 

 are gravels of Triassic pebbles with boulders of Lower Magnesian 

 Limestone with Axinus below them. 



About Hatfield Moor, in the low peat land^ are some low- 

 lying- mixed gravels with large erratics, (a) Granite, (b) Mill- 

 stone grit and gannister ; and (r) Whin sill, gannister, and grit. 

 (? Borne by floating ice when the thaw had begun.) In the 

 Balby boulder clay (d) are numerous erratics as already reported, 

 e.g., Snap granite, Eskdale granite, quartz porphyry, etc. 



About Cusvvorth (e) are numerous erratics, turned up by the 

 plough, e.g., gannisters, grits, mountain limestone, whin sill, 

 quartz porphyry, etc. 



At Cadeby (g) are large rounded boulders of Lower Magne- 

 sian limestone and coarse gravel, mostly carboniferous, with 

 a few mountain limestones. 



Very similar material is found at Conisborough (h). 



At Adwick-on-Dearne (/) is a large Shap boulder. It is 

 worthy of remark that the Shap boulders found at Royston, 

 Adwick, and Balby are each traversed by a vein of felspar. 

 (? Are they all fragments of one piece.) 



In the Balby clay and in the gravels near Bawtry a very 

 large percentage of the Lower Magnesian limestone boulders 

 contain fossils, Axinus, Mya, Turbo, etc. Near the base of the 

 Lower Magnesian is a very constant bed containing these 

 fossils. The only place where I have found this fossil bed 

 cropping out is at Hooton Pagnell (k). Here it is about 15 feet 

 thick. 



CUMBERLAND. 



Reported by John Carlton, Hull Geological Society. 



Skiddaw. On left of pathway to top of Skiddaw, about 30 yards 

 above second hut, 1,450 feet above Keswick, 

 Glacial striae were observed on solid slate from which the 

 turf had been recently removed. Direction W.S.W. 



YORKSHIRE. 



Reported by G. A. Auden. 



Dringhouses, York. 



Carboniferous sandstone, two large boulders, one weighing 

 3 — 4 tons, obscurely striated. 



1902 July 1. 



