On Raised Beaches and Rolled Stones at High Levels in Jersey

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The valuable paper of Prof. Prestwich on ‘ The Raised Beaches, and ‘ Head ’ or Rubble-drift, of the South of England,’; which has thrown so much light on the Quaternary geology of that area, is especially interesting to me. for in Jersey there are well-marked post-Glacial deposits which have hitherto received little attention from geologists. The brick-clay or brick-earth, which covers so much of the island, I have already described, and I am now desirous of directing attention to the higher raised beaches, and to other evidences of alteration in the height of the land, more especially of considerable and probably long-continued subsidence. Several writers have already described or mentioned the low-level raised beach, found in places all round the island —as, for example, Mr. Trevelyan, Lieut. Nelson, Prof. Prestwich, and Father Noury The last-named geologist, however, seems to doubt its being a raised beach in the proper sense of the term. Mr. T. W. Danby, on the authority of the late Dr. M. Bull, mentions a raised beach on the west coast of the island, said to be about 100 feet above the level of the present beach and in Latham and Ansted's work on the Channel Islands it is stated that a raised beach about 30 feet above the present mean level of the sea was laid bare during the construction of Fort Regent. The most elevated raised beach which I have as yet observed is that on the top of the soutehrn part of the

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