LINCOLNSHIRE COAST BOULDERS. 
F, M. ;BURTON, F.L.S., F.G.S. 
Gainsborough. 
URING a short stay at Sutton-on-Sea on the east coast of 
Lincolnshire last August, I met with a few erratics of some 
f 
foll cea I am mainly indebted to Mr. T. Sheppard, of Hull, and 
the Rev. W. Tuckwell, Rector of Waltham, who have most 
kindly scaratned and described them. 
The specimens selected, 20 in number, Mr. Sheppard says, 
‘are very interesting, and show a state of things similar to that 
at Spurn’; and though augite-syenite, shap granite, and typical 
rhomb-porphyry, are not represented amongst them, he feels 
confident that all three will be found in the locality. 
These erratics extend for miles along the coast to the south, 
and are more or less in evidence, according as the sand, for 
which the beach is famed, is scoured off by the tides or heaped 
up by the winds : the one exposing the other hiding them from 
view. On the north, where the sea retires to a considerable 
distance—as at the Saltfleet flats and other places where the 
winds and waves have less power—fewer fragments are met with. 
In such localities they are covered over by long stretches of sand 
and mud, which are seldom disturbed, and over which the sea 
only creeps occasionally, when the higher tides are on 
As these erratics consist, for the most part, of Sanit stones 
and pebbles on the beach (as at Holderness), and are not isolated 
boulders, or boulders of a large size, I have not thought it 
necessary, except in a few instances, to give their measurements. 
Those not given vary from three inches to not much more than 
an inch in superficial length. 
Their description is as follows :— 
- No. 1. An igneous rock, neither granite nor typical gneiss, 
but something between the two. It contains rounded grains of 
milky quartz, with large black crystals of hornblende and small 
flakes of golden-coloured mica. Iron and other minerals occur 
in it, but in very small quantities. Probably not British. 
No. 2. very beautiful, coarse gabbro (338 x 1% x % 
inches), lice that on Carrock Fell described by Harker in 
- J. Geol. 
No. 3. A very good example of hornblende schist, with a 
thin vein of quartz running roves the owe Probably 
ae 
