64 Notes on the Geology of South Ferriby. 
position of the boulder was in the foot of the cliffs, just under the 
place where until recently a cottage stood, about midway between 
the Hall and the chalk quarry. 
Similarly, a study of the ‘erratics,’ or far-travelled boulders 
in the clays leads to the same conclusion. Amongst them are 
trhomb-porphyry and other characteristic rocks from the vicinity 
of Christiania, which have found their way over the North Sea ; 
black flints, (non-British), probably from the bed of the. sea ; 
Scottish rocks, Carboniferous Limestone and Basalt from Teesdale, 
an abundance of Liassic fossils from Whitby, and other specimens 
from the Yorkshire coast. There is also a fair proportion of 
fragments of Kimeridge shale with the usual crushed Ammonites 
and other fossils. These however have probably been derived 
from some outcrop in the vicinity. Most of the specimens just 
enumerated occur in the purple clay. 
Perhaps the most interesting discovery made was in the form 
of a pebble of Shap granite, which was in the clay at a depth of 
18 feet.* ‘This I believe is so far the only record of this rock 
occurring in the boulder clay for Lincolnshire. A larger piece of 
the same rock is near the gate-post at the entrance to Mr. Milson’s 
mill yard on the top of Barton Hill. The particular pebble found 
in the clay was unquestionably carried down from its home, 
Wastdale Crag in Westmorland, by the Teesdale glacier, then 
down the east coast and up the Humber by the aid of the 
Scandinavian ice, on the final melting of which it was dropped 
with other material in the moraine on the Humber side. 
In a paper “On the drifts of the Humber Gap,’’f Mr. J. W. 
Stather described these sections, and gave sketches of different 
parts of the cliffs. These are all included in the accompany- 
ing diagram, which may be taken as a fair representation of the 
cliff section from the chalk jetty to Ferriby Hall. 
“Notes on the Occurrence of Boulders of Shap Granite, ete., 
in Lincolnshire, by the present writer, Naturalist, November, 1896. 
It is a matter for regret that the Lincolnshire Boulder Committee, 
which did so much good work at that time, seems to have since lost 
its energy. 
{Proe, Yorks. Geol, Soc., Vol. 13, pt. 2, 1896, pp. 210-220, 
