221 
As we get away from tlie outcrops of the older rock, we 
find that the gravel gets finer in character, and in some of 
the sections, e.g.^ Selby, it seems to be represented by 
" quicksand." A " quick sand," or " crying sand," as it 
is locally termed, is a loose sand with worn particles and 
saturated with water ; in more elevated districts a quicksand 
usually rests upon a bed of clay, which holds the water up, 
but in this instance the quicksand rests upon the Red Sand- 
stone, and it is saturated because it lies below the sea-level, 
60 that there is no means for the water to get away. I have 
seen no fossils in this gravel. 
3. Laminated Clay. — This is a bed very constant in 
character over a large area, although usually covered with 
a thin bed of sand ; it is a strong clay, of a dark grey colour, 
with occasional tints of brown and blue, and splits, when 
dry, into fine Lamina). At Selby it is 48 feet thick, and 
at Cawood it is said to be 57 feet. At Goole it is about 
20 to 30 feet thick, but over the subterranean ridge of red 
sandstone, of which I have spoken, it thins out, so that at 
Rawclifie Station it is only 3 feet, and at Hook Bridge 
apparently only \\ feet thick. There is a difficulty, how- 
ever, in correlating this section with others. At the brick- 
yard at West Cowick, near the edge of the Red Sandstone 
ridge, the clay contains thin ripple-marked partings of red 
sand and small fragments of coal. About Selby and Barlby 
this clay contains a seam of sand a foot or more thick (Sections 
13 and 16). The clay contains no fossils to show whether 
it be of lacustrine, estuarine, or marine origin, but from its 
finely laminated character, and its resemblance to the 
modern warp, I think that it must have been formed in a 
fragments of local rocks, mostly oolite and lias, in highly inclined beds, resting 
unconformably upon horizontal strata of sand and laminated clay. At a higher 
level, nearer EUoughton, is a gravel with rounded boulders of Carboniferous Sand- 
stone and Millstone Grit. 
