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at the bottom we have, 1, Boulder clay ; 2, Gravel ; 3, Lami- 
nated Clay ; 4, Sand ; 5, Peat ; G, Warp. 
1. The Boulder Clay is not to my knowledge exposed in 
the Ouse valley lower down than Escrick, where it forms low 
undulating mounds, running transversely to the general 
course of the valley. A good section is exposed in the rail- 
way cutting at Escrick station, where it is seen to consist of a 
dark unstratified clay, part tough, part sandy, with round 
imbedded masses and contorted layers of sand, and containing 
many pebbles and boulders of all sizes up to two feet diameter, 
chiefly of Coal-measure sandstone. Millstone Grrit, and 
Mountain Limestone ; the sandstone and grit being rounded, 
the limestone angular, with blunted corners, and charac- 
teristically smoothed and striated. In an adjoining field is a 
small gravel pit, in which are seen alternate layers of gravel, 
brown sand with imbedded boulders, and tough laminated 
clay ; all dij)ping strongly to south-west. Some limestone 
pebbles in t-he gravel still preserve ice scratches. Similar 
beds at York and Fulford contain fragments of Shap Fell 
granite, and other stones from the Lake district. 
In three of the borings near Goole I find mentioned what 
appears to be the Boulder Clay. At Pemberton's Brewery, 
Goole, at a depth of 65 feet, we have clay and cobbles 
(Section 6). At Booth Ferry Road (Section 8), at 25 feet, 
warp clay, a large pebble,^' which pebble, I am informed, 
took three hours to break ; and at Helliwell's Brewery, 
Eawclifi'e (Section 9), at 47^ feet, ''clay with gravel in 
each case resting immediately on the Red Sandstone. I did 
not, in either case, see the specimens, and the evidence from 
borings is less satisfactory than that from exposed cuttings, 
as the pebbles may have fallen out of superjacent gravel beds. 
2. Wherever in this district the Triassic rock approaches 
the surface, we find resting upon it a coarse Gravely with 
alternations of sand ; even where the Trias is superficially 
