 | | Journal (article/letter/editorial) | | BERYLLIUNT MINERALS IN THE VICTORIO MOUNTAINS' LUNA COUNTY, NEW MEXICO* Wrr.r.rauT. HorsBn, Cornell[Jniaersity...Cornell[Jniaersity,Ithaca,N. Y. ABSTRACT Beryl, helvite, and beryllian idocrase occur within a small area in the Victorio...but which did not alter the limestone visibly' Helvite forms tetrahedral crystals that cut calcite and...and garnet in tactites at the same locality. Beryllium has been found in other tactites in smali amounts...theory for the origin of these beryllium minerals is proposed: beryllium occurs as beryl in rocks rich |  | | Journal (volume) | | Geology of Santa Rosa Mountain Area, Riverside County, California, by Lawrence B. Wright Geology and...Diego 15 County, California, by S. C. Creasey Tin Deposits of the Gorman District, Kern County, California...Mountain area, T. 7 S., R. 5 E., S.B., Riverside County, California A, View northwest from near west center... Geologic map, Julian-Cuyamaca area, San Diego County, California 16 Geologic and topographic map, Friday...Kern County, California 38 Geologic map and sections of Upper Butler tin prospect, Kern County, California |  | | Book | | geological analyses, founded on the principles of the occurrence and exploitation of ore deposits, will insure...rock types, geologic structures, and modes of occurrence of mineral deposits, several basic facts are...metamorphic effects imposed on contiguous rocks and the occurrence of primary structures within the formerly molten...Columnar jointing in Columbia River basalt, Benewah County, Idaho. Courtesy W. R. Wagner Fia. 2. Lenticular...from their physical characteristics and modes of occurrence, sedimentary rocks are frequently identified |
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