Abstract
American Journal of Science, October. —Fractional crystallisation of rocks, by G. F. Becker. Among the phenomena most often appealed to in support of the theory of magmatic segregation or differentiation is the symmetrical arrangement of material in certain dikes and laccolites. But this separation is more readily accounted for by the theory of fractional crystallisation. Before solidification, the lava constituting a dike or laccolite is subject to convection currents. The colder masses flowing down the sides of the bed deposit first the less fusible rock, leaving the more easily fusible mass to solidify in the centre.
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Scientific Serials. Nature 56, 631–632 (1897). https://doi.org/10.1038/056631a0
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DOI: https://doi.org/10.1038/056631a0