Back Issues: March/April 1994

Rocks & Minerals (69:02)
March/April 1994

FEATURES

90 Ice as a Mineral
    Edwin L. Clopton

104 Secondary Lead-Copper-Zinc Minerals from the Titusville Mine, San Juan County, Colorado
    Tom Rosemeyer

108 Collecting Mineralogical Bookplates
    John Sinkankas

112 Connoisseur's Choice: Vivianite, Morococala Area, Oruro, Bolivia
    Robert B. Cook

115 Twentieth Rochester Mineralogical Symposium: Contributed Papers in Specimen Mineralogy

120 Canada's Dinosaur Stamps an their Artist
    Susan Robinson

122 Rock Chips: What Makes Niagara Falls?
    R. V. Dietrich

137 1993 Thank Yous

DEPARTMENTS

85 Chips from the Quarry

86 Letters

87 Geo-Currents
    Jane M. Matty

128 Museum Notes & Announcements

132 Media Reviews
    Robert B. Cook, Alexander U. Falster, Arthur E. Smith

138 Coming Events

141 Classifieds

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