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Kimberlite of United States

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	64 KIMBERLITE FROM THE UNITED STATES The following represent the peridotite :—



	To these notes may be added a few remarks on the specimens which I find in Professor Lewis' collection :— The hand specimen [436] labelled ' From James Street, Syracuse, N. Y. (G. H. W. col. Feb. 1888)' is a dark-coloured rock of a greenish tint, slightly mottled in one or two places with a yellower green hue, compact in structure, dull, but with fairly numerous rather rounded spots, up to about one-sixth of an inch in diameter, with a more glistening lustre. The specimen is traversed by a thin whitish vein. In fracture and general aspect it resembles a serpentine, or something between a serpentine and a diabase, except for the slight irregularity in the ' por- ¹ Including O20 of sulphides.

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