Felsic-mafic ratios and silica saturation ratios
Subtitle: their rationale and use as petrographic and petrologic indicators
By: by E.J. Young.
Contributors: Geological Survey (U.S.)
Series: Open-file report -- 89-651.; U.S. Geological Survey open-file report -- 89-651.
Publisher: U.S. Dept. of the Interior, Geological Survey; [Books and Open-File Section, distributor]
Published: 1989
Place of publication: Denver, CO
Language: eng
Format: Microform
Subjects: Petrology -- Mathematics.; Quartz -- Classification.
Notes: Distributed to depository libraires in microfiche.

Microfiche. [Denver, Colo. : U.S. Geological Survey, 1989] 1 microfiche.