XIV.— Note on Two Occurrences of Non-Marine Lamellibranchs in the Coal Measures of the Provanmill District, Glasgow

Abstract

Two discoveries of non-marine lamellibranchs were made in the Provanmill district during the revision of the geological maps of the eastern part of Glasgow in 1954. The localities (Fig. 1) both lie within six-inch quarter sheet Lanark 6 N.E. The author acknowledges with thanks the assistance of his colleague in the Geological Survey, Mr. M. A. Calver, who identified the fossils and provided comments on their stratigraphical significance. Section 1 is in Provanmill Recreation Ground, on the west side of Provanmill Road, 80 yards south of its junction with Royston Road (formerly Garngad Road) (Nat. Grid Ref. NS628672). It was obtained from an artificial exposure, made by Glasgow Parks Department when a new channel was cut for the Molendinar Burn. Previously only the teschenite sill at the top was visble. The section reads as follows: The exposures were not good enough to allow of an accurate measurement of dip. A coal seam several inches thick is said to have been seen a few feet below this section while the channel was being cut, but it is no longer visible. The 1870 edition of the Geological Survey six-inch sheet Lanark 6 shows the outcrop of a 2-foot coal close to this position. Mr. Calver reports that “the faunal evidence suggests a position near the C. communis—A. modiolaris zonal boundary, with the balance of evidence favouring a basal A. modiolaris position”. He regards such a fauna as likely to range from the Upper Drumgray Coal to the Kiltongue Musselband. It is not This 250-word extract was created in the absence of an abstract