Shelly Clay Dredged from the Dogger Bank

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Abstract
Some little time ago my attention was drawn to some notes in the ‘Essex Naturalist’ on the subject of ‘moorlog,’a tough compact peaty deposit, which is dredged from various parts of the southern portion of the North Sea, but principally from the Dogger Bank. It occurred to me that a comparison of this ‘moorlog’ with the post-Glacial peat-deposits, which are found at various points on the coast of East Yorkshire, might prove of interest, and I consequently arranged with Capt. H. G. Foot, of the Hull trawler Grosbeak , to bring me any of the material of this kind that came into his nets. He informed me that the ‘moorlog’ is well known to the fishermen of the North Sea, and that great cakes of it are frequently brought up in the trawls. Since then, from time to time, he has procured for me large pieces of this peaty material, which coincides precisely with the description of the ‘moorlog’ given by Mr. Clement Reid, and supports his suggestion that it represents a land-peat accumulated on boggy ground. One large slab which Capt. Foot brought in, however, was of peculiar interest, as it showed adhering to the peat a portion of another deposit of altogether different character. This adherent material was not peaty, but consisted of dark silty clay with shells, and when dried bore some resemblance to the shelly marls that occur in some of the post-Glacial lacustrine deposits of the coast, though differing in the character of the shells, which

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