28 



Lastly, overall the preceding we find in many places a consi- 

 derable thickness of blown sand. 



Such are the phenomena exhibited in the dills of Holderness. 



The masses of transported materials on the top of the Wolds, 

 and still more the enormous masses which, on many parts of the 

 coast between Filey Bridge and Redcar, are piled upon the 

 regular strata to the thickness of 150 feet, admit of the same 

 general subdivisions as the (Murium of Holderness, and 

 undoubtedly belong to the same epoch. As we advance towards 

 the north, the fragments of chalk beuin to disappear; and frag- 

 ments of magnesian limestone and of other rocks derived from 

 the county of Durham begin to be more abundant 



Conclusions. 



The following conclusions may, I think, be fairly deduced 

 from the facts above stated. 1. The diluvium of Holderness and 

 of the whole east coast of Yorkshire, is due to a set of causes 

 which have acted over the western moors, and over all the great 

 central plain of the county. 2. The diluvial currents which 

 produced the gravel of Holderness were probably contempora- 

 neous with other more powerful currents which drove large 

 masses of primitive rocks from Scandinavia to the plains of 

 Yorkshire. And it seems probable that the same currents were 

 contemporaneous with those mighty propelling forces which 

 have driven innumerable fragments of the Scandinavian rocks 

 over the great plains of Russia, Poland, and Germany. 



Diluvium at the Base of the Cumberland Mountains, §c. fyc. 



IV. During the three last years, 1 have examined every part 

 of the great cluster of mountains which is bounded by the 

 valleys of the Lune and the Eden, and by the western coast 

 from Moricambe Bay to Solway Firth. On its eastern side, this 

 region is united with the great central chain of England ; but on 

 all other sides through three-fourths of its circumference, it is 

 skirted by a succession of plains, or lands of low elevation, which 

 are almost entirely buried under accumulations of diluvial 

 matter. From the foot of Stainmoor to Solway Firth, through 

 the whole plain of the new r red sandstone, the incoherent mate- 

 rials under the vegetable soil are spread over the greater part of 

 the surface, and are often of such an enormous thickness as 

 entirely to conceal all the subjacent strata. These accumula- 

 tions are not partial or irregular ; but seem to have been rolled 

 out over the surface of the country by an inundation which 

 acted at one moment over the whole district; and like all simi- 

 lar deposits, they coutain an incredible number of large bowl- 

 ders, principally derived from the neighbouring mountains. 



On approaching that part of the plain which borders on the 

 northern extremity of the hilly region, we meet with pebbles and 



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