The geology of the south-western part of Clun Forest

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Abstract
In my recent paper on the Kerry district ( Q.J.G.S. xciv, 1938, p. 125) a map of the highly contorted strata in the western part of Clun Forest was published, and the characters and origin of the beds were discussed. Over the southern part of the district which they occupy, however, no account of the related strata was given. The associated beds occupy the area described here, and the description completes the stratigraphical account of the whole region occupied by the contorted beds. The stratigraphical subdivisions adopted are similar to those in the Kerry district, but, as in the southern part of that district, the Leintwardinensis Shale group cannot be separated. The thickness of strata included between the base of the Wilsonia Grits and the base of the Dayia Beds is here about 3500 feet. This is 500 feet greater than that estimated for the equivalent beds in the Kerry district. The difference may be due to actual thickening, but it is possible that the thickness in the latter district was rather under-estimated. In the Kerry paper, also, it was mentioned that the Platyschisma Beds are never more than 40 feet, and are usually about 25 feet thick. In this district they are even thinner, and seldom exceed 15 feet in thickness. I. Detailed description of the beds (a) Ludlovian (i) Graptolitic Lower Ludlow Shales .—Only the upper three or four hundred feet of these have been examined. They are chiefly dark grey, thinly bedded shales, sometimes nodular in character, but seldom

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