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Garlick, G. Donald1
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The Petrographic Distinction between Basalt and Andesite Based upon the Arrested Fractionation of Plagioclase Phenocrysts.
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Garlick, G. Donald; Garlick, Benjamin J. – Journal of Geological Education, 1987
Discusses the need to take into account the effects of arrested fractional crystallization in the petrographic classification of volcanic rocks containing plagioclase phenocrysts. Describes the development and use of a computer program to accomplish this task graphically. (TW)
Descriptors: Classification, College Science, Computer Assisted Instruction, Computer Graphics