Page:The New Forest - its history and its scenery.djvu/258

Rh It is a bed, however, which is seldom open, and can be worked only at particular tides. It may easily be recognized as lying between the Leaf Bed and the well-marked Lignite Bed, which shows the first traces of salt-water, and where, in the lower portion, Neritina concava may be abundantly found. This last bed may be well seen at Beckton Bunny (section II.). The lignite, however, though it will give a good deal of heat, will not blaze. Locally it is sometimes used for making black paint.

Passing on to Beckton Bunny we reach the first true bed of the Lower Marine Formation, which rises a little eastward of that ravine. I have distinguished it as the Olive Bed, from the 240