. The Quarterly journal of the Geological Society of London. Fig. /. Z>. i?., Photomicr. Bemrose Ltd., Collo. Schistose Grit and Quartzose Schist. Quart. Journ. Geol. Soc. Vol. LX, Pl. II Fig 1

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Keywords: ., bookcentury1800, bookdecade1840, booksubjectgeology, bookyear1845