WOOD AND ROME — LINCOLNSHIEE AND S.E. YOKKSHIKE. 181 



to J. A. Wade, Esq., of Hornsea, and other gentlemen, for informa- 

 tion suppHed, and for assistance in our investigations. 



V. Appendix. 



In the course of our examination of the district we collected a 

 considerable number of borings, with the idea that they would speak 

 for themselves. The similarity, however, in the lithological cha- 

 racter of most of the beds, although of no moment in the coast-section 

 (fig. 1), becomes, in borings, a source of confusion. It therefore ap- 

 pears to us that to give these borings in detail would not be attended 

 with any advantage commensurate with the space they would occupy ; 

 and we merely propose briefly to epitomize their results, as far as we 

 have been able to put a satisfactory interpretation on the particulars 

 recorded. 



As shown in figs. 5, 8, and 11, the Hessle clay overlaps the pur- 

 ple clay on the east of the Wold. Between Hessle (where that clay 

 with its gravel rests direct on the chalk, and where the latter rises 

 considerably above the Humber) and HuU, we have a boring at 

 Dairycoates which shows the Hessle beds only over the chalk, the 

 purple clay (which is tolerably thick at Hull) having thinned out at this 

 place, which is one mile west of Hull *. At Hull a series of 29 

 borings along the river-front, preliminary to the dock- excavation, 

 disclosed the existence of the purple clay underlain by a sand- and 

 gravel-bed, answering to " 5" of the coast-section (fig. 1), the chalk- 

 floor being at a depth of 103 feet below highwater-mark. Several 

 other borings in, and immediately around, Hull disclose the same 

 sand and gravel, but of very irregular thickness ; they also show 

 the purple clay thinning ofl" and disappearing towards the north of 

 the town, and the rise of the chalk there to within 50 feet of the 

 surface. Two miles north-east of Hull, however, at Sutton, the 

 chalk is 105 feet from the surface. The dock-borings at Hull work 

 out into the subjoined resulting section (fig. 14, p. 182). 



Two borings at Sunk Island gave the chalk at a depth of 112 and 

 113 feet respectively, passing in their upper parts, in the one case, 

 through 58, and in the other through 34 feet of recent deposits, then 

 through a thickness of red and brown clay with some chalk, answering 

 to the base of the purple clay, then through the beds (6) of the coast- 

 section (fig. 1), and, finally, through a small thickness of the base- 

 ment clay (a), in the one case through 5, and in the other through 



* The boring is as follows : — 



feet. ins. 



Warp 20 



Peat 2 



Clay with small checkers (Hessle clay) ... 19 6 

 Sand with small shells (Hessle sand) 12 6 



Chalkat 54 



The clay with small checkers answers exactly to the character of the Hessle clay. 

 The shells in the sand were not seen by us ; but the gravel at Paull and at Kilnsea, 

 which we regard as the Hessle sand, is fossiliferous. 



o2 



