The Quarterly journal of the Geological Society of London . discard the former, and to use the latter term mpreference. With regard to the age of the Cape Formation, he hadpointed out in the paper that the Witwatersrand Beds were probablycorrectly correlated with the Table Mountain Sandstone, and thatthe latter was underlain by the Bokkeveld Shales, in which cha-racteristic Palgeozoic (Devonian) fossils had been found. Replying to Prof. Le Xeve Foster, he instanced the Nigel Mineas one that had been opened up in payable ore on the southern sideof the synclinal. There was nothing to indicate wh
The Quarterly journal of the Geological Society of London . discard the former, and to use the latter term mpreference. With regard to the age of the Cape Formation, he hadpointed out in the paper that the Witwatersrand Beds were probablycorrectly correlated with the Table Mountain Sandstone, and thatthe latter was underlain by the Bokkeveld Shales, in which cha-racteristic Palgeozoic (Devonian) fossils had been found. Replying to Prof. Le Xeve Foster, he instanced the Nigel Mineas one that had been opened up in payable ore on the southern sideof the synclinal. There was nothing to indicate which of theconglomerate-beds might carry gold, short of taking samples forpanning or assay. He saw no objection to the use of the word mineralization^ to indicate a secondary impregnation with mineral matter. He was glad to find that Dr. Gregory confirmed him m the ideathat the Dwyka Conglomerate was a volcanic breccia, and conse-quently iDdicative of volcanic activity. Quart. Jonrn. Geol. Soc. Yol. LIY. PL VI. Quart, Journ. Geol. Soc. Vol. LIY. PI, YI,. Scale of EnSllsti Mil TO PABVS , BE 29 vt. or i. Vol. 54.] THE PYKOMERIDES OP BOULAT BAY (jERSET). lOi 7. On the PrROMEEiDEs of Botjlay Bay (Jersey). By JoHifParkinson, Esq., (Read December 15th, 1897.) [Plate VII.] Contents. p^^^^ I. Introduction lUl II. Grenerai Characteristics ot the Rock 101 III. Comparison with other Districts 110 IV. Pyromerides with relatively large Quartz-enclosures 116 I. Introduction. The acid lavas forming the more easterly part of the northern coastof Jersey have been the subject of investigation by many de Lapparent, in a note on the eruptive rocks of the Isle ofJersey ^ published in 1884, summarized these accounts, and hispaper was extensively quoted by M. Noury in his G^eologiede Jersey, published a few years later, the quotations includingthose paragraphs which relate to the work of previous earliest is that of Macculloch, in 1817, in which a hornstone-porphyry is
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