408 MR. a. W. LAMPLUGH ON THE 



filled hollows of the coast to the northward. At Cayton, Scar- 

 borough, Robin Hood's Bay, Whitby, &c., though the details vary, 

 the general arrangement is essentially the same. 



(u) Inland Sections of Flamhoroucjh Head. — The inland sections 

 scarcely need further description than has already been given. 

 Usually nothing is revealed in them except a few inches, or, at the 

 most, a few feet of weathered Boulder-clay resting on shaken Chalk, 

 and even this is absent from the higher ground at the western edge 

 of the area included in the Map (fig. 1, p. 387). 



In one or two instances, however, local deposits of chalky gravels 

 lead to some modification of the section, these apparently replacing 

 the clay. The best example is in the deep railway-cutting north of 

 Flamborough Station, which obliquely crosses a partially drift-filled 

 hollow of the Chalk draining down to the Bempton valley, showing 

 thick sand and chalky gravel with a few drift-pebbles banked 

 against steep valley-walls of chalk. These beds are probably of 

 freshwater origin ; but I am not aware that they have yielded 

 fossils of any kind. There are also one or two pits opened into the 

 Sewerby Gravels in the neighbourhood of Marten. 



The Late Glacial and Kecent deposits at the mouth of the Main 

 Wold Valley were excellently revealed in the Bridlington drainage- 

 sections : but these have been discussed in another paper *. 



Y. BOULBEES. 



The shores of the headland are strewn with boulders derived 

 from the wasting cliffs, generally thinly scattered, but sometimes 

 in great numbers, especially, as already mentioned, towards the ex- 

 tremity of the promontory. There are at least 7000 boulders 

 exceeding one foot in diameter on the beach between South Sea 

 Landing and High Stacks. I have recently compiled several cata- 

 logues of the larger boulders lying within a given area, not only 

 on Flamborough Head, but also, for the sake of comparison, at 

 various other parts of the Yorkshire coast both north and south of 

 Flamborough, and have been so fortunate as to obtain the assistance 

 of Mr. Alfred Harker, M.A., F.G.S., in the petrological examination 

 of the more interesting specimens t. 



My lists have been condensed in the following table J : — 



* ' Glacial Sections near Bridlington : Part iii. The Drainage Sections,' 

 supra cit. 



t ' On the Larger Boulders of Flamborough Head,' part i., Proc. Yorks. 

 Geol. & Polytechn. Soc. vol. ix. (1887) p. 340 : parts ii. & iii. vol. xi. (1889) 

 p. 231 ; part iv. vol. xi. (1890) p. 397 ; also Eeports of Brit. Assoc. (Leeds, 

 1890) p. 375. 



\ See Eeports of Brit. Assoc. (Leeds, 1800), p. 375, and part iv. of paper 

 above quoted, for further details. 



