176 MINERAL PRODUCTS. 
trade in lime is carried on at Hessle. The coralline oolite is burnt 
about Seamer. Ayton, Pickering, and Malton ; and the Cave oolite at 
Hawsker, Maybecks, Commondale, Scugdale, Coxwold, Newborough 
Park, Brandsby, Westow, Sancton, Ellerker, &c. The lime from the 
oolites is less pure than that from the chalk, but all kinds are used in 
agriculture as well as for building. 
Bricks are very generally used in Holderness and the vale of ork, 
where the diluvial clay is an abundant and suitable mateiial, and in 
Cleveland, where the lias clays furnish an additional supply. In the 
moorland valleys the shales might be employed for the same purposes, if 
the prevalence of sandstone did not render it unnecessary. 
The nodules and layers of flint which occur in the chalk of the 
Wolds might be of value in the neighbourhood of potteries, but at pre- 
sent provide excellent materials for the roads. The basaltic dyke, the 
Bath oolite, slaty stone of Brandsby, and coral bed of the Pickering oolite, 
furnish very good stone for this use, and, in their absence, Holderness 
and the vale of York yield plenty of waterworn gravel. 
Excepting limestone, the agriculturist employs none of the 
mineral productions of the eastern part of Yorkshire as manure. Pos- 
sibly some varieties of the red and white marls near the mouth of the 
Tees might be available in this respect, as they are in the midland 
counties. In Holderness, the shell marl so generally found beneath the 
lacustrine deposits of peat, might, perhaps, be found useful if spread on 
the pastures; but it could hardly fail to produce excellent effects if 
spread upon the peat itself, in the mode adopted in the northern part of 
Lancashire. If this suggestion should be found correct, considerable 
benefit would result from the practice, for many such peaty hollows 
exist in the interior of Holderness, which can neither be obliterated by 
a covering of warp, nor corrected by ordinary industry. 
