Page:Quarterly Journal of the Geological Society of London, vol. 25.djvu/532

408 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [June 23, deposits had scarcely been suggested*, the author thought it best to remain ignorant of what had been said about this particular locality previously to his making a series of personal observations†.

districts of Lancashire. See Mem. Lit. Phil. Soc. Manchester for 1863-64, and Memoirs of the Geological Survey.
 * Mr. Hull has lately worked out this division in some of the more inland

† Since making observations on the Blackpool drifts, I have seen perhaps the finest section of the three drifts in vertical succession to be met with in south Britain. It is about 150 feet high, and embraces Lower Boulder-clay, middle sand and gravel, and Upper Boulder-clay. The drifts are exposed in a river-cliff at Redscar, about three miles north-east of Preston. They will be described in one of Mr. Hull's forthcoming Geological Survey Memoirs. The Lower Boulder-clay is here much less stony than at Blackpool and in Furness.

Fig. 1.—Sketch-map of parts of Lancashire and Cumberland.

Lower Boulder-clay.

Middle Sand and Gravel.

Upper Boulder-clay.

EXPLANATION

The Maps of north-west Lancashire and part of Cumberland are intended to give are either driftless, or they have not been examined by the author. In Furness believed to be equivalent to the more decided drift of the neighbourhood.