METEK — THREE DATS AT FAIUlI>^GDOH'. 
9 
3. Section at East Pit, 
Surface soil . . . 
Little Coxwell 
Red gravel — a dark ferru- 
giuous deposit composed 
principally of minute 
subangular pebbles and / 
coarse sand, mixed witb 
terebratula, bryozoa, etc., 
and few sponges. 
Junction of RedandSponge- 
gravels 
Sponge-gravel as in Wind- 
mill Pit. Sponges abun- 
dant. 
r Y0 
Kimmeridge clay ? 
Coral-rag . . . 
4. Section at Windmill Pit, Little Coxwell. 
Sui-face soil .... 
Sponge-gravel — a mixture 
of shells, sponges, bryo- 
zoa, etc., with but little 
sand and few pebbles ; 
the whole mass of a rich \ 
cream or light ferrugi- 
nous coloui-, regularly 
stratified. 
Kimmeridge clay . 
Coral -rag . . . 
^45 
These sections are intended to exhibit the Farringdon deposits in their relative position ; 
the measurements in those portions of the sections noted as obscure by the dotted 
line at the sides of the woodcuts must, however, be taken as merely approximate, as we 
had no means of ascertaining their real thickuess. 
section at Badbury Hill. Had he done so, he must have noticed the 
fact that the same forms of Brachiopoda, with the addition of T. 
ohlonga, and the same species of Bryozoa occur there which are found 
in the Red-gravel of East pit ; and noticing this, lie could hardly have 
separated the " Sponge-gravels" so entirely from all the surrounding 
deposits as he ultimately appears to have done. In one very impor- 
tant particular Mr. Sharpe is surely wrong. In page 178 of the above- 
mentioned memoir, he describes the ironstone deposits of Furze Hill, 
and the Sponge-gravels, as forming " two deposits on the same Jevely 
abutting against one another.'^ Now my impression is that the lower 
layers of the ironstone of Furze Hill, where in position, are decidedly 
above the level even of the higher portion of the Sponge gravel ; and 
I was at first somewhat at a loss to account for the fact, supposing 
that the ash-coloured sands which we found to underlie the iron- 
stone on Furze Hill, formed a portion of the Kimmeridge clay, and 
not, as we afterwards found in the Badbury Hill section, a deposit 
resting upon the Red-gravel. 
The accompanying sections, compiled, with Mr. Evans's assistance, 
from notes taken on the spot, the parts margined by tlie double lines 
being from exposed vertical sections, will show more fully my idea 
of the position of the various deposits ; and it follows that if these 
views as to the position of the " Sponge-gravel " are correct, the 
VOL. YTT. C 
