. The Earth beneath the sea : History . (b) Fig. 28. (a) Aggregates of microcrystalline harmotome and nontronite. The aggregates contain Ba2+ and Fe2+ as principal cations, and often considerable amounts of thormm (in one instance 2200 ppm). The density varies owing to substitution of lighter cations for barium; the highest density measured is The aggregates have a high magnetic susceptibility. The microcrystallites rarely exceed a few microns in length, (b) Radio- autograph of harmotome-nontronite aggregate showing emerging alpha particle tracks, [(b) from Picciotto and Arrhenius, unpubl

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. The Earth beneath the sea : History . (b) Fig. 28. (a) Aggregates of microcrystalline harmotome and nontronite. The aggregates contain Ba2+ and Fe2+ as principal cations, and often considerable amounts of thormm (in one instance 2200 ppm). The density varies owing to substitution of lighter cations for barium; the highest density measured is The aggregates have a high magnetic susceptibility. The microcrystallites rarely exceed a few microns in length, (b) Radio- autograph of harmotome-nontronite aggregate showing emerging alpha particle tracks, [(b) from Picciotto and Arrhenius, unpublished.]

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Keywords: ., bookcentury1900, bookcollectionbiodivers, booksubjectoceanbottom