File:The Quarterly journal of the Geological Society of London (12513010175).jpg

456
PEOCEEDINGS OP THE GEOLOGICAL SOCIETY. .June 19,
rhizome, rose in a serpentine direction to the seam of gravel 2 feet
above, where it ended, and no trace of it was seen either in the gravel
or the sand above. This section was seen by Mr. Flower and Mr.
Searles Wood, the latter of whom suggested, in explanation of the
position of the frond, that the rhizome of the fern must have been
washed down by the stream, the heavier part resting on the bot-
tom, and the frond rising towards the surface, in which position it
must have become imbedded in volumes of sand. If this expla-
nation is correct, it is evident that the flow of the river at that time
must have been from west to east, viz. the direction of the present
river. I leave it, however, for botanists to determine whether it may
be possible that the rhizome of a fern of the surface-period may, by
natural growth, have descended to so great a depth as 8 feet 6 inches
from the surface.
Section G, at the top of Lome Terrace, surface 83 feet, furnished
the largest and best-formed implement discovered in this place. It
is triangular, 8 inches long and 4 inches at the base ; the natural
surface of the flint is left at the butt-end. It was found beneath
several deposits of sand, gravel, and brick-earth, at a depth of 13
feet 6 inches from the surface. The upper surface of the London
Clay was here seen to slope gently upward towards the north.
Section H (fig. 4), shows the position of a number of flakes remark-
Fig. 4. — Section H, in High-terrace Gravel north of Chaucer Road.
Surface 82 feet.
9 ft.
-'fSot;*
a. Surface soil, 6 in. b. Brick-earth with seams of white sand, 4 ft. c. Gravel