The Yorkshire Dogger

Abstract

In parts of Rosedale and Farndale the Serpula Beds are exactly as in Fryup and Danby; they consist of very fine-grained sandstones or silts, blue, grey, green, yellow, or brown in colour, according to the degree of oxidation, and always full of worm tubes. In many specimens it is clear that practically the whole of the material has been passed through the bodies of worms, leading to a very confused structure. The worm tubes may be several inches long: they are only occasionally vertical or straight, but usually arranged in an irregular manner. Fossils, usually broken and badly preserved, are sporadic, but deter-minable ammonites of the striatulum and dispansum zones have been recorded in different parts of the area (Macmillan, 1932, and this paper).