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Opal from
Miocene outcrops, Alconada de Maderuelo, Segovia, Castile and Leon, Spain


Locality type:Formation
Classification
Species:Opal
Formula:SiO2 · nH2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Opal data
Locality Data:Click here to view Miocene outcrops, Alconada de Maderuelo, Segovia, Castile and Leon, Spain
Photo GalleryView Gallery (3 photos)
Data Identifiers
Mindat Occurrence Record ID:1413285
Long-form Identifier:1:3:1413285:6
GUID (UUID V4):5f3765d2-14a1-4bdb-b1fc-c8240b6f3100
Nearest other occurrences of Opal
63.8km (39.6 miles) La Cabrera pluton, La Cabrera, Community of Madrid, Spain
66.9km (41.6 miles) Isabel Quarry (La Saludadora Quarry; La Cabrera pluton), Valdemanco, Community of Madrid, Spain
68.6km (42.6 miles) El Madroñal Quarry (La Cabrera pluton), Valdemanco, Community of Madrid, Spain
69.1km (43.0 miles) Peña Mojada Quarry (Los Alisos E Quarry; La Cabrera pluton), Valdemanco, Community of Madrid, Spain
69.2km (43.0 miles) Los Alisos W Quarry (La Cabrera pluton), Valdemanco, Community of Madrid, Spain
References
Reference Search (possible matching items)
Book (volume)
..467 Appendix D - The Various names & Forms of Opal .......................................473 Appendix...Deposits..................493 Appendix H - Igneous and Metamorphic Rock Types ............................field, collecting gem and mineral samples somewhere in the United States or Canada, and each year I spend...started this annual process, I decided to find a new and more complete reference to reduce my research time...the most useful references were no longer in print and were rarely available to collectors at local libraries
Book (volume)
..469 Appendix D - The Various names & Forms of Opal .......................................475 Appendix...Deposits..................495 Appendix H - Igneous and Metamorphic Rock Types ............................field, collecting gem and mineral samples somewhere in the United States or Canada, and each year I spend...started this annual process, I decided to find a new and more complete reference to reduce my research time...the most useful references were no longer in print and were rarely available to collectors at local libraries
Book
PU'"'' ~ l 9 s ~ uS L 10, f • =- ..-.Ai • GEMS and MINERALS of AMERICA OTHER BOOKS BY JAY ELLIS RANSOM...Mines and Minerals The Rock-Hunter's Range Guide Petrified Forest Trails Arizona Gem Trails and the Colorado...Tension (A Biography) Jay Ellis Ransom EMS of and MINERAL AMERI A A Guide to Rock Collecting HARPER...in different form in A Range Guide to Mines and Minerals and The Rock-Hunter's Range Guide, both by Jay...of brief quotations embodied in critical articles and reviews. For information address Harper & Row, Publishers
Book (volume)
................................4 Alaska County and Stream Map ...................................................................242 Michigan Streams and Lakes Map ....................................................................346 New York – Essex and Warren County Site Map .........................................................455 Texas – Sulfur and Barite Deposits in the Delaware Basin ...............566 Appendix D - The Various names & Forms of Opal .......................................572 Appendix
Book
John K. Warren SEDIMENTS, RESOURCES and hydrocarbons Digitized by the Internet Archive in 2019 with...Sediments, Resources and Hydrocarbons John K. Warren Evaporites: Sediments, Resources and Hydrocarbons TKomas... reproduction on microfilm or in any other way, and storage in data banks. Duplication of this publication...Law of September 9, 1965, in its current version, and permission for use must always be obtained from Springer-Verlag...exempt from the relevant protective laws and regulations and therefore free for general use. Typesetting:
Report (volume)
continent, Greenland, the West Indies and adjacent islands, Hawaii, Guam, and other island possessions but not...listed alphabetically by author, with full title and publication data. There follows a subject index to...index are those used by the individual authors, and their listing here does not imply approval by the...S. Loud, Mildred C. Mead, Virginia S. Neuschel, and Dorothy B. Vitaliano. The "Bibliography of North...1235 (1965), 1266 (1966), 1267 (1967), 1268 (1968), and 1269 (1969). VI SERIAL LIST Acad. Nat. Sci. Phihdelphia
Report (issue)
southern California region Oil and gas in onshore California basins ____ Oil and gas in Califomia coastal basins..._______________ Oil and gas geology southern California borderland ___________________________ Oil and gas seeps...____________________ Offshore wells ____________________ Oil and gas geology southern California borderland Continued...maturity ___ ____ __. Organic maturity of Paleogene and Neogene samples _______ _ _. Potential petroleum...borderland of southern California showing inner and outer basin areas _______________________________________
Book (edition)
BIBLIOGRAPHY OF THE GEOLOGY OF INDONESIA AND SURROUNDING ARE AS Edition 7.1 – 8 June 2020 J.T. VAN GORSEL............. 396 II.3. Sumatra - Offshore Forearc and islands........................................................... 1516 VIII.1. New Guinea General and West Papua ........................................ 2472 X.1. Quaternary-Recent faunas-microfloras and distribution .............................................. 2594 X.6. Quaternary Hominids, Mammals and associated stratigraphy.........................
Report (volume)
The Formation and Evolution of Africa: A Synopsis of 3.8 Ga of Earth History The Geological Society...-KUMAR (JAPAN ) GONZALO VEIGA (ARGENTINA ) MAARTEN DE WIT (SOUTH AFRICA ) Geological Society books refereeing...makes every effort to ensure that the scientific and production quality of its books matches that of its...volume editors follow strict guidelines on refereeing and quality control. We insist that individual papers...Journal of the Geological Society. The referees’ forms and comments must be available to the Society’s Book
Report (issue)
RESOURCES AND RELATED GEOLOGICAL AND GEOPHYSICAL STUDIES (1960 - 1972) By Frank F. H. Wang and Paula Quinterno...OPEN-FILE REPORT 83-153 This report is preliminary and has not been reviewed for conformity with U.S. Geological...of trade names is for descriptive purposes only and does not imply endorsement by the USGS. PREFACE...bibliography was presented at the Circum-Pacific Energy and Mineral Resources Conference in Honolulu, Hawaii...1983 TABLE Of CONTENTS fa*. C.3.10 Magnetism and Paleoagnetism. . . . . . FOREWORD. ZZ. EXPLANATION
Report (volume)
Comparing the Geological and Fossil Records: Implications for Biodiversity Studies The Geological...Satish-Kumar (Japan) Gonzalo Veiga (Argentina) Maarten de Wit (South Africa) Geological Society books refereeing...makes every effort to ensure that the scientific and production quality of its books matches that of its...volume editors follow strict guidelines on refereeing and quality control. We insist that individual papers...Journal of the Geological Society. The referees’ forms and comments must be available to the Society’s Book
EDITORS JAMES EDWARD D. and DANA. S. ASSOCIATE EDITORS Professors and JOSIAH COOKE, GEORGE P...GEORGE F. GOODALE of Cambridge. NEWTON New L. and A. Haven, BARKER, E. VERRILL, of of Philadelphia...— Tertiary 265. Page With by Clarence King, and II Geology of Calvert 1 Cliffs, Maryland ; by...Bar Base Apparatus III. of the S. TJ. Coast and Geodetic Survey Woodward ; by R. S. . Geyser;...Observations of the Andromed Meteors of November 23d and 27th, 1892; by H. A. Newton VII. — Preliminary Notice
Journal (volume)
EDITORS JAMES EDWARD D. and DANA. S. ASSOCIATE EDITORS Professors and JOSIAH COOKE, GEORGE P...GEORGE F. GOODALE of Cambridge. NEWTON New L. and A. Haven, BARKER, E. VERRILL, of of Philadelphia...— Tertiary 265. Page With by Clarence King, and II Geology of Calvert 1 Cliffs, Maryland ; by...Bar Base Apparatus III. of the S. TJ. Coast and Geodetic Survey Woodward ; by R. S. . Geyser;...Observations of the Andromed Meteors of November 23d and 27th, 1892; by H. A. Newton VII. — Preliminary Notice
Book (volume)
Environmental Impact and Health Effects HENDERSON Inorganic Geochemistry RAMDOHR The Ore Minerals and their Intergrowths...Deposits in Africa, Asia (exclusive of the USSR) and Australia RIDGE Annotated Bibliographies of Mineral...2: Southern and Centrat Europe RUSSELL Oil Shales of the World: Their Origin, Occurrence and Exploitation...International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts Journal of Structural...including examples from the USSR in both Europe and Asia JOHN DREW RIDGE Department of Geology, University
 
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