 | | Journal (article/letter/editorial) | | 1962 STUDIES OF THE MANGANESE OXIDES. V. RAMSDELLITE, MnO2, AN ORTHORHOMBIC DIMORPH OF PYROLUSITEl...RrcuMoND.s AND Howano T. EvnNs, Jn.2 ABSTRACT Ramsdellite is an orthorhombic dimorph of pyrolusite; the...monotropic. Examination of crystals from the Gavilan Mine, Mexico, shows them to be pseudomorphs after groutite;...the U. S. Geological Survey from Lake Valley, New Mexico, was found to give a distinctive fi.-ray pattern...mineral as that from Lake Valley. It was named ramsdellite and a preliminary report, in which this name |  | | Journal (article/letter/editorial) | | Manganese minerals in geodes from Chihuahua, Mexico ROBERT B. FINKELMAN, HOWARD T. EVANS, JR., AND...been observed in geodes from Chihuahua, Mexico. Ramsdellite occurs in a number of different habits, but...Pyrolusite is found only in association with ramsdellite and is believed to be an alteration product of...mineralogy of geodes from North Central Chihuahua, Mexico, Finkelman et al. (1972) observed fifteen minerals...oxides: birnessite, cryptomelane, pyrolusite, ramsdellite, ranci6ite, and todorokite. We have since confirmed |  | | Report (issue) | | SURVEY PRELIMINARY DEPOSIT-TYPE MAP OF NORTHWESTERN MEXICO By Kenneth R. Leonard U.S. Geological Survey...4. of Mineral Deposits in Northwestern Mexico Los Gavilanes Tungsten District El Antimonio District... Preliminary Deposit-Type Map of Northwestern Mexico Kenneth R. Leonard Introduction The following...Sonora, North Baja California, South Baja California and the northern part of Chihuahua, Mexico. The area...prospects, and mineral occurrences in northwest Mexico. A record may refer to one deposit or to a group |  | | Journal (article/letter/editorial) | | show that the transformations groutite(a-MnOOH)-ramsdellite(MnO2)-pyrolusite{MnO~) are topotactie, with the...appropriate, protons. Pure single crystals of ramsdellite could not be prepared by heating groutite, even...to be the stable form. The other polymorph, ramsdellite, is orthorhombie and belongs to the diasporegoethite...isostructural with ramsdellite (Gruner, 1947; Collin and Lipscomb, 1949). Groutite and ramsdellite are generally...space groups of groutite, ramsdellite, and pyrolusite are: M groutite ramsdellite pyrolusite a 4.58, 4 |  | | Report (issue) | | Director Bulletin 954-F MANGANESE DEPOSITS OF MEXICO BY PARKER D. TRASK AND JOSE RODRIGUEZ CABO, JR...in cooperation with the UNIVERSIDAD NACIONAL DE MEXICO, INSTITUTO DE GEOLOGIA SECRETARIA DE LA ECONOMIA...DIRECTIVO PARA LA INVESTIGATION DE LOS RECURSOS MINERALES DE MEXICO under the auspices of INTERDEPARTMENTAL..._____.____ Baja California (by Ivan F. Wilson and Mario Veytia)_____________ Lucifer mine (4)___--.___--_-_---...__._ 241 Magistral mine area (26)___--___---______-__---___---_-____ Zacate mine (27)_.________....- |  | | Journal (article/letter/editorial) | | from a bulk sample of ramsdellite from Lake Valley, Sierra Country, New Mexico, supplied by Dr. Howard...1496). Bixbyite (a-Mn20s) from Carton City, New Mexico, supplied by Dr. Howard T. Evans, Jr., gave well-shaped...These changes are similar to the change groutite-ramsdellite discussed in an earlier paper (Dent Glasser and...composition and structure between groutite and ramsdellite, and to the extra 'weak phase' noted by Fleischer...and Evans (1962) in parallel orientation with ramsdellite. Table I I shows data for groutellite from various |  | Rodríguez-Díaz, Augusto Antonio, Canet, Carles, Villanueva-Estrada, Ruth Esther, Chacón, Elizabeth, Gervilla, Fernando, Velasco-Tapia, Fernando, Cruz-Gámez, Esther María, González-Partida, Eduardo, Casas-García, Raymundo, Linares-López, Carlos, Pérez-Zárate, Daniel (2019) Recent Mn-Ag deposits in coastal hydrothermal springs in the Baja California Peninsula, Mexico. Mineralium Deposita, 54 (6) 849-866 doi:10.1007/s00126-018-0846-9 | Journal (article/letter/editorial) | | coastal hydrothermal springs in the Baja California Peninsula, Mexico Augusto Antonio Rodríguez-Díaz 1,2...Bahia Concepcion Bay of the central-eastern Baja California Peninsula. Hot spring activity is related to...are associated with the opening of the Gulf of California. The hot springs are hosted by Miocene volcanic.... Native silver . Mn-stromatolites . Gulf of California Editorial handling: T. Monecke Electronic supplementary...México, Ciudad Universitaria, 04510 México City, Mexico 5 Centro de Geociencias, Universidad Nacional |  | | Journal (issue) | | 12-5_____________________ photo by H arold and Erica V an Pelt, Los A ngeles Publisher John S. White Editor Wendell...by W. Hunt Famous mineral localities: the Hilltop mine ..........................................121 by...by D. K. Miller and W. E. Wilson The Silver Bill mine, Gleeson, Arizona ................................of an Indian miner was found preserved in a salt mine, where he had been killed in a cave-in (see Thompson...Don Antonio de Mendoza, the Viceroy of New Spain (Mexico). Tejoc described seven fantastically wealthy Indian |  | | Book | | 353-416 257-320 321-384 225-288 137-224 CALIFORNIA ] 273-336 ARIZONA-IV ] 1-102 [ 17 / 1986...On a spectacular find of crocoite in the Adelaide mine, Dundas, Tasmania (by A. H. Chapman) 3:111-113 ADOLFSSON...AJO Famous mineral localities: the New Cornelia mine, Ajo, Arizona (by W. J. Thomas & R. B. Gibbs) 14:283-298...ALLEN, GEORGE B. --and W. Hunt: The Tonopah-Belmont mine, Maricopa County, Arizona 19:139-144 ALLGOOD, GENNE...County, California 18:41-45, 18:62-64 --with W. H. Wilkinson, R. W. Allgood, C. Williams: Ramsdellite from |  | | Report (volume) | | Geology in Canada: Hume, G. S., Gunning, H. G., 5. California, southern, pegmatites: 3. Arciniega, V. M. Geology...Billings, M. P., 1. look: Clifford, O. C., Jr. Mexico, Paricutin ash deposits, Ore detection by new devices:...Science and hobby: Meen, V. B. , 1. Pegmatites, California, southern: Mineralogy and the field geologist...geological history and Future: Conselman, F. B. , 7. Mexico: Guzman Jimenez, E. J., petroleum geology: Thomas...Gravenor, Cuebec, St. Lawrence Lowlands, C. P., 15. California, Barstow quadrangle: Trenton group, Ordovician: |  | | Report (volume) | | headings are: ALABAMA, ALBERTA, CANADA, JAMAICA, MEXICO, NEVADA, and UNITED STATES. CANADA and UNITED STATES...Academia Nacional de Ciencias Memorias y Revista. Mexico, D.F. Acad. Nat. Sci. Philadelphia Mon.; Notulae...Hancock Foundation Publications Occasional Papers. Los Angeles, Oalif. Am. Acad. Arts Sci. Proc. American...Asociaci6n Mexicana de Ge61ogos Petroleros Boletfn. Mexico, D.F. Asoc. Venezolana Geologla, Minerla y Petroleo...Bibliografico de Geofisica y Oceanografia Americanas. Mexico, D.F. Bol. Historia Nat. Boletin de Historia Natural |  | | Book | | Western Hemisphere 11. Prehistoric Obsidian in California I: Geochemical Aspects ... ....... .. .........183 Robert N. Jack 12. Prehistoric Obsidian in California II: Geologic and Geographic Aspects ...... ....Riverside, California February, 1976 R.E. Taylor Department of Anthrop9logy University of California 1 ...Gulf Coast or Olmec region of Mesoamerica (ancient Mexico) sometime early in the 1st millenium B.c. This...1961 1963 1963 1963 1967 1967 23 45 46 55 47 48 Los Angeles, 1967 Brothwell and Higgs Berger 1969 1970 |  | Gaines, Richard V., Skinner, H. Catherine W., Foord, Eugene E., Mason, Brian, Rosenzweig, Abraham, King, Vandall T. (1997) Dana's New Mineralogy (8th ed.) Wiley-Interscience. p.1872 | Book (edition) | | Cisneros: Minerological Research Co., San Jose, California. Andrew M. Clark: Dept. of Mineralogy, Natural...Currier: Jewel Tunnel Imports, Baldwin Park, California. Stanley Dyl: Seaman Mineralogical Museum, Michigan...Canada. Richard C. Erd: U.S.G.S., Menlo Park, California. Howard T. Evans: U.S.G.S., Reston, Virginia...Claren N. (‘‘Si’’) and Ann Frazier: Berkeley, California. Carl Francis: Mineralogical Museum, Harvard...Paris, France. Legrand A. Gould: Pebble Beach, California. George E. Harlow: Dept. of Min. Sci., American |
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