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1.- CHARACTERISTICS OF QUARTZ GRAINS IN SOME MIDDLE ORDOVICIAN K-BENTONITE BEDS FROM THREE DIFFERENT GEOGRAPHIC REGIONS
GEOLOGICAL SOCIETY OF AMERICA (GSA); BOULDER, CO; USA; UNITED STATES, 1996
GEOLOGICAL SOCIETY OF AMERICA, NORTHEASTERN SECTION, 31ST ANNUAL MEETING
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2.- VARIABILITY IN BIOTITE COMPOSITION AMONG FOUR ORDOVICIAN TEPHRAS, AND COMPARISON WITH CENOZOIC VOLCANIC BIOTITES TO CONSTRAIN TECTONOMAGMATIC SETTING
GEOLOGICAL SOCIETY OF AMERICA (GSA); BOULDER, CO; USA; UNITED STATES, 2004
GEOLOGICAL SOCIETY OF AMERICA, 2004 ANNUAL MEETING
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