 | | Journal (article/letter/editorial) | | THE PARAGENESIS OF THE WALDEN PEGMATITE, PORTLAND, CONNECTICUT (PART III) (Continued from last issue)...N. Y. Quartz in soda-lithium pegmatite is generally much less abundant than the cleavelandite and lepidolite...core margin zones or in the core itself, euhedral quartz crystals are likely to be deposited along with...in the lithium replacement body in the Walden pegmatite appears to be: first, caesium beryl, either morganite...cyrtolite; fan-like, hemispherical growths of cleavelandite and lepidolite, probably of simultaneous deposition; |  | | Journal (article/letter/editorial) | | was done by the senior author in New Mexico and Colorado at various times during the summers of 1948, 1949...GeologicalSurvey; + Contribution from the Department Michigan, No. 169. of Mineralogy and Petrography, University...154), "There is an abundanceof coarsegranite pegmatite bouldersin the immediate neighborhood of the quarry...unusually large scale . . . is due to the action of pegmatite intrusions upon the materials of the gneisslimestone...contact zone." Specimensof rose mica-bearing pegmatite from Bolton show the following megascopiczonal |  | | Journal (article/letter/editorial) | | Figure 2. Index map of the Copper Mountain district, Fremont County, Wyoming. Guffy Peak and Birdseye Pass...Geological Survey topographic maps. The entire pegmatite district is on U.S. public lands administered by the...does require permission. Visitors to the pegmatite district are requested to pass through this land without...private property, the Quien Sabe Ranch, owned by Murk 1. Jacobson, a consulting editor of Rocks & Minerals...titled “Beryl from the Catherine No. 1 Mine, Cusper Mountain, Natrona County, Wvoming ” and appearc.d in the |  | | Journal (article/letter/editorial) | | Park, Maryland. Hafi, John C., Colorado School of Mines, Golden, Colorado. Heyl, George R., U. S. Geological...Subscribers t944 6 2tl 522 JIJ 1052 Srerrsrrcs Loss 1 1945 5 218 549 344 Gain 10 t27 39 100 8 t116 ...issues and in the distribution of the reprints have no doubt caused some annoyance to a number of our readers...articles on quartz oscillatorplates. These valuable and timely contributions on the geology of quartz crystal...inspection, grading, cutting and testing of thin quartz wafers, were made possible largely through the |
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