The crystallization process of basalt

Author:: Barth, Tom F.W.
Title:: The crystallization process of basalt
Periodical:: American Journal of Science, Fifth Series
Year:: 1936
Volume:: 31
Pages:: 321-351
Subject:: Feldspar Crystalization Lava Geology Mauna Kea
Summary:: The essential mineral phases of ordinary basalts are plagioclase feldspars which form a reaction series from calcic to sodic with or without individual crystals of alkali feldspar as the last product, and pigeonite pyroxenes which form a reaction series from diopsidic to clinohypersthenic. Depending upon the initial composition of the basaltic magma either plagioclase or pyroxene will start to crystallize, changing the composition to a point where simultaneous crystallization takes place. An equation has been developed giving the conditions for such a simultaneous crystallization. Comments on papers by Tsuboi, Kennedy, and Powers are offered.
Label:: Geology
Date:: May 1936
Collection:: Periodicals