. The geology of the country between York and Hull. (Explanation of quarter-sheets 93 S. E., 94 S. W., and part of 86) . theprincipal rivers, such as the Ouse, Derwent, and others, there is astrip of modern alluvium, forming a narrow tract below the levelof the surrounding country. This, as it approaches the Humber,becomes merged with the modern warp or tidal alluvium of thatestuary, which latter is continuous with the ancient warp men-tioned above, so that no lines can be drawn between them. AtBrough there are 18 feet of this clay. Intimately associated with these deposits is a bed of peat, w
. The geology of the country between York and Hull. (Explanation of quarter-sheets 93 S. E., 94 S. W., and part of 86) . theprincipal rivers, such as the Ouse, Derwent, and others, there is astrip of modern alluvium, forming a narrow tract below the levelof the surrounding country. This, as it approaches the Humber,becomes merged with the modern warp or tidal alluvium of thatestuary, which latter is continuous with the ancient warp men-tioned above, so that no lines can be drawn between them. AtBrough there are 18 feet of this clay. Intimately associated with these deposits is a bed of peat, whichvaries in thickness from a few inches to as much as 20 feet. Itis well exposed in the Humber at Melton below high-water mark,and has been met with in several of the sections given peat contains the stumps and trunks of great numbers oftrees, the former being firmly rooted in the sands, and exhibitingthe marks of tools with quantities of waste chips, thus showingthat these beds have been covered up since the advent of man. Fig. of the Hamber-Shore at Melton, showing Peat with Stumps of (.tvtl ef lew ^uter (V /iwfccafc* &HJ - SUPERFICIAL DEPOSITS. 39 Blown Sand.—In the neighbourhood of Sancton, and alsocovering the Lias terrace between Houghton and North Cave, isa vast deposit of sand, which about Houghton Moor has entirelyaltered the aspect of the country, and instead of the ground being,as one would expect, a stiff clay from the Lias, it is quite a sandydesert. This sand, which has evidently been blown from theplain to the west, covers the Oolites and Chalk about Sancton,rising to an altitude of 400 feet above sea-level. The sandy mounds below Cliff and elsewhere in the plain havevery much the aspect of sand dunes, and it is in all probabilityfrom here that these sands originally came. 40 CHAPTER VII. PHYSICAL STRUCTURE. Lie of the Rocks, Faults, &c—The physical structure of thisdistrict is extremely simple, and divides the country, as we men
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