94 Lincolnshire Notes & Queries. 



NOTES ON THE ICE-BORNE BLOCKS 

 OF SHAP GRANITE, St., FOUND 

 IN LINCOLNSHIRE. 



By THOMAS SHEPPARD, 



Hon. Secretary to Hull Scientific and Field Naturalists' Club, and Member of the 

 Glacialists 1 Association. 



WHILST examining the erratics in the vicinity of Barton 

 for the newly-formed Lincolnshire Boulder Committee, 

 I found a boulder of Shap Granite, measuring 2 feet 

 6 inches by I foot 3 inches, by I foot +. This was 

 at the foot of a gatepost at the entrance to Mr. Milson's 

 mill, near the top of the hill just outside Barton, on the South 

 Ferriby Road. The granite in question was well rounded and 

 thoroughly embedded in the ground, so that its precise 

 dimensions could not be ascertained. Owing to its long 

 exposure to the atmosphere the upper part is weathered, the 

 large pink felspars being very prominent. It was in its present 

 position when Mr. Milson took charge of the place several 

 years ago, and I have no doubt it came originally from the 

 boulder clay which occurs in the neighbourhood, though up to 

 the present I have been unable to get any definite information 

 on the point. So far as I can learn, this is the first boulder of 

 Shap Granite recorded for Lincolnshire. 



A few weeks later, when walking along the Humber bank 

 between South Ferriby Hall and the Chalk Pit, I was fortunate 

 enough to find a small pebble of the same rock in 'the Boulder 

 Clay at a depth of eighteen feet. I have this pebble before 

 me as I write. Though small, it is a very good sample, and 

 there is no doubt whatever that it is Shap Granite. The 

 characteristic felspars are exceptionally well shown, and, though 

 the pebble is only an inch and a half long, there are portions 

 of no less than four porphyritic crystals of felspar thereon, one 

 of them showing the 'twinning.' This specimen, it should be 

 noted, was found in the clay only about two miles from the 

 previously mentioned boulder. 



