Nature, Volume 93Sir Norman Lockyer Macmillan Journals Limited, 1914 |
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Página 177
... origin of veins to a transformation of the rocks into metallic minerals and their accompanying vein - stones , along certain directions now marked by the course of the veins , the -olvents that effected the alteration finding a path ...
... origin of veins to a transformation of the rocks into metallic minerals and their accompanying vein - stones , along certain directions now marked by the course of the veins , the -olvents that effected the alteration finding a path ...
Página 178
... origin ascribed to certain titaniferous iron - ores in basic eruptives , chromite in peridotites , nickeliferous pyrrhotite in norite , and primary platinum in ultra - basic rocks . Similarly pegmatites , and even some quartz - veins ...
... origin ascribed to certain titaniferous iron - ores in basic eruptives , chromite in peridotites , nickeliferous pyrrhotite in norite , and primary platinum in ultra - basic rocks . Similarly pegmatites , and even some quartz - veins ...
Página 408
... origin of man in America , and the origin and spread of aboriginal American culture are put forward as special questions re- quiring to be decided . The solution of the problem of the " extra - American origin of culture . . . would ...
... origin of man in America , and the origin and spread of aboriginal American culture are put forward as special questions re- quiring to be decided . The solution of the problem of the " extra - American origin of culture . . . would ...
Índice
GEOLOGICAL SOCIETY at 8 An Apparently Paleolithic Drawing on | 36 |
Note on a Functional Equation | 51 |
RadioActive Elements and the Periodic Table | 121 |
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