ON THE BEMBRIDGE LIMESTONE AT CREECHBARROW HILL. 131 
Prt V. (about 10 feet below the summit on the west side of the hill). 
(a) Surface soil. Ft. in. 
(b) Clay with angular flints ‘ 3 $ = 5 : 3 $ 2 6 
(c) Very stiff hardened clay with pieces of rubbly limestone con- 
taining much manganese and soot-like patches . : Saget uel 
(d) Fragments of Bembridge Limestone very rich in fossils. This 
was where I obtained the chief collection made during my 
former visit. On this occasion we obtained a good specimen 
of Unio, the first, I believe, found at this horizon 2 0 
(c)Hard crumbling limestone . ; : ; ; 7 0 
(f)Sandy clay . : : . d - ; é - : . 9 0 
(g) Grey sands with quartz pebbles and broken flints. On my 
former visit I found a large fragment of Bembridge Lime- 
stone at a depth of 13 feet not far from this pit. This 
specimen is now in the Sedgwick Museum . : : 4 0 
34 0 
The lowest bed we touched was the drab sandy clay at the bottom 
of Pit ITV., which is the same as that seen in the brick-pit, and the 
thickness of which I estimate to be not less than 40 or 50 feet. It 
seems to have been much used for dressing the land, and we found 
many old pits from which it had been obtained along the west side of 
the hill. This clay I regard as the equivalent of the Lower Headon 
formation. The coarse sand, which occurred above this, I take to 
be the Middle Headon Venus Bed, while the mottled red and green 
clays or marls which we found about 16 feet below the summit of the 
hill much resembled the Osborne Series. 
Of the part of the hill explored by us I should say that- about 
three-quarters consisted of Oligocene Strata and the rest of sand 
and gravel. 
There is everywhere evidence of great disturbance of the strata, 
whether we refer this chiefly to large movements of faulting and over- 
thrust, or the more superficial action of landslips, soil creep, &e. The 
result has been a kneading up together of various deposits, so as to 
produce in many parts a mass much resembling some boulder clays. 
In fact, when I noticed the same kind of boulder clay at the bottom 
of the St. Erth Beds,- being familiar with the great masses of ice- 
transported rock further north, I often felt inclined to ask whether 
the limitation of the southerly extension of ice action was so certain 
as is generally assumed. But I am also acquainted with the great 
earth movements affecting our south coast, and with the ever-recurring 
landslips along such an escarpment as we have at Creechbarrow. I[ 
do not, therefore, feel inclined to press any explanation here without 
further evidence. 
In conclusion, I may be allowed to offer my thanks to Mr. Bond, 
the owner of the property, and to Mr. Trent, his tenant, for kind 
permission to carry on the work; also to Mr, Pike and Mr. Bloomfield 
for much information and assistance. 
K2 
