 | | Journal (issue) | | Directions of magnetisation of Cretaceous lavas, Madagascar . . . . . Directions of magnetisation of individual...individual cylinders of Cretaceous lavas, Madagascar . . . Demagnetisation curves of Tertiary and Quaternary...magnetisation of Upper Tertiary volcanoes, Nairobi district, Kenya . . . . Mean directions of magnetisation...biotite-ve·rmiculite. Minor constituents include gypsum, iron-oxide pseudomorphs after garnet, felspar...abundant concretions of kankar and minor amounts of gypsum. No original rock structures are preserved, the |  | | Report (issue) | | Indian Ocean___________________________________ Madagascar (Malagasy Republic)_____________ Minor islands-Kerguelen...Africa and the Union of South _.o\frica_________ Madagascar (Malagasy Republic) showing location of thermal...rocks. Sulfate (S0 4 ) results from the solution of gypsum and anhydrite and is present in considerable amounts...sulfide (HzS), which may be produced by reduetion of gypsum and other sulfates or by decomposition of organic...totaling about 25 individual springs. Deposit of gypsum. Resort. Refs. 109. 389, 394, 39.'i. 128, 144, |
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