Page:Quarterly Journal of the Geological Society of London, vol. 26.djvu/304

196 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [Jan. 12, it was thinner, and reposed on undisturbed Lias clay. There appears, however, to have been somewhere here a patch of re-formed clay and scratched stones, as my pupils J. B. Alexander and C. S. Taylor and I frequently found stones, apparently glaciated, in this pit, but could never find them in situ. There used to be the appearance of the sand graduating into the ordinary drift.

Fig. 1. — Section in Rugby Pit.

a. Drift, 2 feet. b. Sand, 4 feet. c. Brown clay with chalk pebbles.

Very near this is the New-Bilton Pit. Here the gravel is from 6 to 10 feet in thickness, deepening towards the hill. The gravel is in some places very rudely and imperfectly stratified. The rounded quartzose pebbles lie, in one section at least, but not universally, with their long axes vertical. The surface soil is easily separable from the drift. The remarkable feature at New Bilton is the inequality of the level of the clay. It is Lias clay, and contains pebbles only just imbedded in its surface ; but it is extraordinarily uneven, some ridges rising 5 or 6 feet in height and overhanging their bases, as in the accompanying sketch (fig. 2). The gravel lies in basins and in

Fig. 2. — Section at New-Bilton Pit.

a. Surface soil. b. Flints and sandy drift. c. Lias clay. furrows in the clay. Occasionally detached portions of the clay, or