REMARKS ON THE DILUVIUM. 
75 
such profusion along the shores of Filey bay, Cayton bay, Carnelian bay, 
and the south and north cliffs of Scarborough, as well as in the retiring 
cliffs of Robin Hood’s bay, Upgang, Runswick bay, Skinningrave bay, 
and the long range of coast west of Saltburn. Nor, though most plenti- 
ful in the hollows of the coast, is it unknown on the heights, for it occu- 
pies the very highest precipice of chalk, four hundred and thirty feet 
above the sea, lies in abundance on Gristhorpe, and covers the summit 
of Huntcliff. 
To give a complete catalogue of all the varieties of pebbles which lie 
in this clay, would be a work of great labour and little interest. Such 
comparisons are important only in proportion to the light they throw on 
the probable direction in which the waters moved, that transported them 
to their present localities ; and this object is better attained by selecting 
a few well-defined rocks, than by gathering loads of ordinary specimens. 
W e find mixed up in this diluvial clay, fragments of rocks belonging to 
the granitic and slate series, as well as to the independent and secondary 
formations ; and it is often possible to determine the districts, and even 
the particular hills from which they have been drifted. Thus we trace 
back to Shap fell its porpliyritic granite ; to Carrock fell its sienite and 
greenstone ; to the Grasmere mountains their amygdaloidal and brec- 
ciated grauwacke ; to Kirby Stephen its calcareous breccia; to Teesdale 
its greenstone ; and to Western Yorkshire its limestone, sandstone, and 
coal. But it is from Durham that we have derived the concretionary 
limestone of Building hill, and we must seek in Scotland, and perhaps 
Norway, for the original sites of our garnet slate, porphyries, amygda- 
loids, hornblende, diallage, and hypersthene, and a still greater distance 
has been travelled over by the fragments of Labrador felspar. Generally 
speaking, we may say the waters, which brought together the hetero- 
creneous mass of diluvium which loads the coast of Yorkshire, flowed 
O 
from various points of the compass between N. and W. 
Besides these effects of diluvial streams flowing from great distances, 
we trace the results of less extensive currents. The wasted cliffs of 
Robin Hood’s Bay have probably furnished the numerous lias and marl- 
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