238 REPORT — 1887. 



but tliere are both gravel and sand in the immediate neigtbonrbood. I 

 believe that it rests on Glacial red clay, but the clay, sand, and gravel 

 are irr*^gularly distributed through the town ; I think it is red clay there. 



jq^OTB. — I have found Shap Fell granite several times in the bed of the 

 Tees, at Pierce Bridge, and at Low ConiscliiFe. 



Erratic block at village of Sadberge, three miles N.E. of Darlington. 

 The boulder vpas found in Glacial clay vphile excavations were being made 

 for a reservoir. About 6 ft. 6 in. long, 4 ft. high. Estimated weight 

 four tons. A wedge-shaped mass. The boulder is long-shaped, and has 

 been moved. On what has originally been the base of the boulder there 

 are innumerable striee in the direction of the longer axis, and all parallel 

 to one another. So far as I could ascertain (the incrustations of clay 

 have not been removed) there were none of the crossings of striae so 

 generally seen. The striae are confined to the original base. The rest 

 of the surfaces are irregular and angular. The rock is a compact 

 encrinital blue limestone, one of the Yoredale rocks, probably from Upper 

 Teesdale, and is 218 ft. above sea- level. Too recently discovered for any 

 legend, but no doubt traditions will gather round it, since, through the 

 following circumstances, it will be known in the future as the 'Jubilee 

 Stone.' Her Majesty is Countess of Sadberge, and the inhabitants of the 

 village determined that one part of their Jubilee proceedings should be 

 the dedication of this large boulder. It was removed from the excava- 

 tion where it had been found to the village green, and on Jubilee Day a 

 service was held in the village church. A procession from the church 

 was then formed, escorted by a troop of yeomanry, an address on the 

 history of Sadberge was given by the Rev. J. W. Baron, the stone was 

 unveiled, and a/eit de join fired over it by the Hussars. 



YORKSHIBR. 



The Committee have received valuable information from the Rev. 

 John Hawell, of Ingleby Greenhow Vicarage, Northallerton, who has 

 examined the erratic blocks in his parish. 



The sheets of the Ordnance Survey maps, which include the parish, 

 are 24 and 43. The genei'al height of the blocks above the sea-level is 

 between 400 and 450 ft. 



Most of the blocks examined are on the surface, in or near the beds 

 of streams ; others have been drawn out in draining. There is a thick 

 tenacious clay in the district, with imbedded blocks, some of which at 

 least are the same as those upon the surface. Further investigations, 

 however, are needed to determine the relationship between the blocks 

 upon the surface and those in the clay. 



The erratic blocks are extremely numerous ; Mr. Hawell has notes 

 of 365, which he has already examined in his parish. It will be sufficient 

 in this report to record examples of the chief varieties as a preliminary 

 to further investigations. 



The Committee have had the valuable assistance of Professor Bonney 

 and Mr. C. T. Clough in the determination of the rocks. In identifying 

 some of the more distant specimens the kind help of Messrs. B. N. Beach 

 and T. Home has also been given. 



The erratic blocks of Northallerton may be arranged in several classes: — 



(A) Blocks uf local origin. — The most numerous blocks of all on the 

 surface are from the local Oolite. 



