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Article: "Right" is wrong.(Letter to the editor)
- Article from:
- Rocks & Minerals
- Article date:
- March 1, 2006
- Author:
CopyrightCOPYRIGHT 2006 Heldref Publications. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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In my former incarnation as an igneous petrologist, I studied extremely explosive volcanoes and must point out that John White didn't "Get It Right" in the September/October issue. His column indicates that basalts melt at lower temperatures than more siliceous rocks such as andesite or rhyolite, but just the opposite is true: basalts melt/erupt at 1,200-1,500[degrees]C and rhyolites at 400-500[degrees] below that.
Perhaps the most efficient way to explain volcanic eruptive behavior is through viscosity, which is the primary factor in determining whether an eruption will be explosive or not. Magmatic viscosity is a function of temperature, mineralogy/composition, ...
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Dana's New Mineralogy.(Review) (book reviews)
Rocks & Minerals;
March 1, 1998 ;
700+ words
... ... appear until 1944. Volume two (Halogenides and All Oxysalts Except Silicates) was completed in 1951, and volume 3 (Silica Minerals) was produced in 1962 by Frondel (Berman had been killed in the war, and Palache had retired). By this time the format ...
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