. The London, Edinburgh and Dublin philosophical magazine and journal of science. beautifully developed flow-structure. Some of therocks are very markedly spherulitic and axiolitic. The axioliticrocks display an interesting structure which the author believes tobe best explained by concluding that during the formation of theaxiolitic growths a slight movement occurred in the unconsolidatedmagma. He gives a full account of the variations which mark thespherulitic and axiolitic structures, and also describes nodular bodiesproduced by flow-brecciation accompanied by very feeble radialgrowth, and
. The London, Edinburgh and Dublin philosophical magazine and journal of science. beautifully developed flow-structure. Some of therocks are very markedly spherulitic and axiolitic. The axioliticrocks display an interesting structure which the author believes tobe best explained by concluding that during the formation of theaxiolitic growths a slight movement occurred in the unconsolidatedmagma. He gives a full account of the variations which mark thespherulitic and axiolitic structures, and also describes nodular bodiesproduced by flow-brecciation accompanied by very feeble radialgrowth, and showing irregular but more or less central quartzoseareas. After describing a brecciated rock, which on the whole is bestaccounted for by a process of flow-brecciation, due to a second lavabreaking up the first while it was still in a plastic condition, theauthor describes true pyroclastic rocks, and concludes with adescription of the conspicuous intrusive diabases, which, in part atall events, seem to be of the nature of a laccolitic intrusion. Phil. Mad. Mint .jitH. LONDON, EDINBURGH, and DUBLIN PHILOSOPHICAL MAGAZINE AND JOURNAL OF SCIENCE [FIFTH SERIES.] NOVEMBER 1897.
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Keywords: ., bookcentury1800, bookdecade1840, bookidlondon, booksubjectscience
