. Geological magazine. g out being due to the curving upwards of thelower or Gannister seam to meet the overlying Bullion mine. DECADE V.—VOL. II.—NO. X. 28 434 Herbert Bolton—Loicer Coal-measures, Lancashire, etc. Although the Bullion mine can be traced southwards to Oldham,westwards to Padihani, and over the whole of Eossendale, its prolificyield of fossils both in nodules and in the surrounding shales iseverywhere remarkable. The Soapstone bed has not been recog-nised, however, outside the Burnley area, but the occurrence of auArachnide, Architarbus suhovalis, from this level at Padiham, wo
. Geological magazine. g out being due to the curving upwards of thelower or Gannister seam to meet the overlying Bullion mine. DECADE V.—VOL. II.—NO. X. 28 434 Herbert Bolton—Loicer Coal-measures, Lancashire, etc. Although the Bullion mine can be traced southwards to Oldham,westwards to Padihani, and over the whole of Eossendale, its prolificyield of fossils both in nodules and in the surrounding shales iseverywhere remarkable. The Soapstone bed has not been recog-nised, however, outside the Burnley area, but the occurrence of auArachnide, Architarbus suhovalis, from this level at Padiham, wouldseem to indicate its presence there. The shales lying upon the Bullion seam outside the Burnleydistrict and those lying upon the Mountain Four Feet in that areaare thus one continuous deposit, and have yielded more than thirty-five species of fossils. The chief repository of fossils lies betweenthe roof of the coal-seam and the Soapstone bed. Above the latterthere is a marked falling off in genera and Diagrammatic Section showing position of Soapstone bed and relation of the Mountain Four Feet to the Bullion and Gannister shale ; s. Soapstone bed shale; m. Mountain Four Feet mine; /. fireclay;bm. Bullion mine ; sa. sandstone; gm. Gannister mine ; r. Gannister rock. The nodules of the Soapstone bed are usually of small size, theaverage being about two inches long by one and a quarter incheswide. The great bulk of them contain a compact mass of theGoniatite, Dimorphoceras Gilhertsoni, Phillips, varying in diameterfrom that of a millet-seed to fifteen millimetres, the latter size beingrare. More rarely, the nodules contain bones and scales of fishes,and, rarest of all, examples of Arachnida, Myriopoda, Crustacea, andAmphibia. A census of the Lower Coal-measure fauna was drawnup two years ago by the writer, from which the following lists offossils occurring in the shales between the coal-seam and the Soap-stone bed and in the Soapstone bed itself have b
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Keywords: ., bookcentury1800, bookdecade1860, booksubjectgeology, bookyear1864
