. Transactions and proceedings and report of the Philosophical Society of Adelaide, South Australia. Fig. Fig. 2. HUSSEY i GILLINGHAM LIMITED, PRINTERS 4 PUBLISHERS ADELAIDE, 165 IV. A mode of origin, in situ, is suggested which is inharmony with the evident pneumatolytic replacement thathas occurred. V. As denoting their manner of origin, it is suggestedthat the name Pneumatolith be attached to such pseudo-segregations occurring in igneous rocks and which owe theirexistence, primarily, to pneumatolytic processes. VI. The evidence of the Tasmanian nodules, while not asclearly delineated as
. Transactions and proceedings and report of the Philosophical Society of Adelaide, South Australia. Fig. Fig. 2. HUSSEY i GILLINGHAM LIMITED, PRINTERS 4 PUBLISHERS ADELAIDE, 165 IV. A mode of origin, in situ, is suggested which is inharmony with the evident pneumatolytic replacement thathas occurred. V. As denoting their manner of origin, it is suggestedthat the name Pneumatolith be attached to such pseudo-segregations occurring in igneous rocks and which owe theirexistence, primarily, to pneumatolytic processes. VI. The evidence of the Tasmanian nodules, while not asclearly delineated as in the Cape Willoughby examples, isstrongly suggestive of miarole origin. Their formation isthen referable to a late stage in the crystallization of themagma. The origin is distinct from the hypothesis of segre-gation, and is closely related to the origin described for theCape Willoughby nodules. The author is indebted to Mr. W. R. Browne, ,for helpful discussion during the preparation of this paper. DESCRIPTION OF XXIII. Fig. 1. Photograph of a typical quartz-tourmaline gene
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectscience, bookyear1878
