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| distributed mineral that, although often occurring in handsome specimens, is commonly overshadowed by the...northeastern United States and is noted as a gangue mineral in some ore deposits. Besides the tourmalines, it is...source of that element in unusual Russian deposits. Because it is commonly available in fine, modestly priced...its attractive nodules have been described recently in the various serialized articles on the Michigan Copper...Copper Country by Tom Rosemeyer (including the one in this issue), datolite has been suggested as the topic |
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| 13 November 2014 C onnoisseur’s Choice columns in recent issues have dealt with two of the three titanium...Subpolar Urals, Russia, has been chosen to feature in this issue. Unlike rutile, and to a lesser extent...Brookite is a transparent to opaque mineral that occurs in various shades of red- and yellow-brown through dark...orthorhombic (2/m 2/m 2/m) and is typically encountered in crystals that are tabular on (010) and elongate and...twinning on (120) has been reported. It is commonly seen in small, sharply formed crystals suitable for micromounts |
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| wide distribution that is particularly well known in spectacular crystals and unusual associations from...structures are also relatively common. It also occurs in granular and compact massive aggregates. Dr. Robert...editor of Rocks & Minerals, is a professor of geology in the Department of Geology and Geography at Auburn...after a variety of minerals, including feldspars, prehnite, laumontite, and leucite, have been reported....best known as a vesicle- or cavity-filling mineral in generally silica-poor intermediate and mafic igneous |
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| Defined Origin of the Name The name zeolite was created in 1756, by Freiherr Axel Fredrick Cronstedt, a Swedish...to boil and puff up in a borax bead, followed by melting to a white glass. The in in "zein" was dropped...known by many local names in the eighteenth century. Most of the research in zeolite mineralogy was done...at that time, in Germany, Italy, France, and Great Britain. Because of differences in language, nationality...The general acceptance of the mineral names used in Traite de Mineralogie by HaUy (1801) formed a basis |
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| Defined Origin of the Name The name zeolite was created in 1756, by Freiherr Axel Fredrick Cronstedt, a Swedish...to boil and puff up in a borax bead, followed by melting to a white glass. The in in "zein" was dropped...known by many local names in the eighteenth century. Most of the research in zeolite mineralogy was done...at that time, in Germany, Italy, France, and Great Britain. Because of differences in language, nationality...The general acceptance of the mineral names used in Traite de Mineralogie by HaUy (1801) formed a basis |
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| occurrencesof calcic scapolites have been found in limestones, in zones altered by igneous intrusions. Most...used rather loosely to indicate a scapolite high in meionite content, or near the calcic end of the series...been regarded, on field evidence, as originating in the deep seated zone ol metamorphism. The associated...however, as reported, are usually found in veins or cavities in basic igneous rocks. The field evidence...occurrenceof scapolite in the quarry of the French Creek Granite Co. at Falls of French Creek, Pa. In composition |
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| GUIDE TO Minerals and Gemstones 154 ILLUSTRATIONS IN COLOUR by CLAUS CASPARI - a collector's guide...revised by JOHN SINKANKAS with 154 illustrations in colour by Claus Caspari THAMES AND HUDSON Tnnslated...Publisher's prior consent, in any form of binding or cover other than that in which it is published and...this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical...storage and retrieval system, without permission in writing from the Publisher. © 15)68 by Droeme=he |
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| University, Bethlehem, Pennsylvania Prehnite Veins in Triassic Diabase, Coopersburg, Pennsylvania Abstract:...Abstract: Veins, principally of prehnite, occur in diabase near Coopersburg, Pennsylvania. Early formed vein...vein minerals are pyroxene and albite (An < 5) in which most of the crystals are choked with fluid inclusions...cores. Later minerals in the sequence are an amphibole followed by chlorite and prehnite. Minor quartz and...and calcite occur with the prehnite. Diabase near the veins shows three zones of alteration. Adjacent to |
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| Triassic deposits 31 Mineral localities 38 District of Columbia Mavtrl a Tirl IWlCfci JT XClilUl...Loudoun County 143 Prince William County 149 Diabase quarries of northern Virginia 155 CAPTIONS Illustrations...Index map showing region covered in this report. Stfaded area is covered in most detail. Figure 2. Block...Complex at Ilchester, Maryland. Figure 6. Triassic diabase dike forming a ridge north of Route 7 near Dranesville...of mineral deposits in Washington, D.C. it Figure 8. Locations of iron mines in the Coastal Plain of |
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| price or value of any specimens discussed or reported in this work. Copies may be purchased, while supplies...MineralogicalRecord.com I IIMORIITE-(Y) EUROPE FRANCE Trimouns quarry, Luzenac, Ariege. Operated for talc since the beginning...beginning of the 20th century, the Trimouns quarry became well known to collectors around 1990 for the...series of rare-earth species found as small crystals in drusy dolomite-lined cavities. The extremely rare...rarely as doubly terminated crystals to I cm floating in vugs of crystalline talc. Easily the best extant |
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| Sulruenv Babingtonite from four new localities, all in Massachusetts, is described. Four new chemical analyses...characters are shown to be essentially identical in all occurrences. Reasons are given for regarding...pyroxene" group, or the feldspar group of minerals in a1l of which it has been at one time or another classified...question of the place in the mineral classification of this rather uncommon mineral. In the following pages...Cambridge on the border of the Boston Basin. A large quarry for road metal has been operated there for some |
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| Bull Run Quarry Loudoun County, Virginia H O W A R D R. F R E E L A N D 10340 Hollyberry Drive Richmond...23234 Most collectors are familiar with fine prehnite, apophyl lite, and zeolite specimens associated...al., 1978; Narsavage, 1977), and at the Fairfax quarry near Centreville, Virginia (Medici, 1972; Mitchell...Mitchell, 1977). There are several other "trap" quarries in northern Virginia which have yielded beautiful and...environments. Bull Run quarry located in Loudoun County, Virginia, is one such quarry. To date, nearly twenty |
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| CATALOGUE OF. MINERAL PSEUDOMORPHS IN THE AMERICAN MUSEUM -B CLIFFORD FRONDEL BU.LLETIN OF THE AMRICANMUSEUM'...71) Article IX.-CATALOGUE OF MINERAL PSEUDOMORPHS IN THE AMERICAN MUSEUM OF NATURAL HISTORY' BY CLIFFORD...and not solids,3 and would also exclude those cases in which organic material has been replaced by quartz...petrifactions and molds, and also: (1) Any mineral change in which the outlines of the original mineral are preserved...change here carries with it a connotation of no change in the dimensions of the surface. The plane-sided, hollow |
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| written long as?o. Here is item 2 (item I appeared in last issue)."—letter dated D e c 21, 1956, from James...stripped mined in Crenshaw County, Alabama, and specimens collected are very interesting in that they look...had been melted and then poured over the surface in layers. Sometimes you will see a thin seam about...Highland Home, Bradenton and Petrey are all small towns in Crenshaw County near which limonite and hematite...(to be continued) ARIZONA—From the Wickenburg Mts. in Yavapai Co., Ariz., 15 miles east ROCKS AND MINERALS |
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| X P L A N A T I O N Detailed sections referred to in text @ Diamond drill hales Manitou 3, 4, 8. 5 N... 9 FIGS.. 4 PLS. FEBRUARY 1951 DIFFERENTIATION IN LAVAS OF THE KEWEENAWAN SERIES AND THE ORIGIN OF...ABSTRACT Five lava flows in the Keweenawan series of the Michigan copper district have been studied and...differentiation in the flows to the origin of the copper deposits. The primary factors in the differentiation...currents probably were not active in the thinner flows and may not have been in the thicker. Alternate hypotheses |
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| Scott Mitchell This is the first dictionary published in the English language devoted exclusively to the names...over 4,000 alphabetically arranged names. In addition to rocks in the usual classification of igneous, sedimentary...and more. A glossary of 200 petrologic terms used in the definitions is included for those who may be...historical value. Foreignlanguage terms frequently used in English-language publications are defined as well...varieties • cave rocks • many decorative and gem rocks In addition to providing concise definitions for each |
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| BI-MONTHLY 1951 MINERALS OF THE ARLINGTON TRAP ROCK QUARRY ON GOOSE CREEK, LOUDOUN CO., VA. By FRENCH MORGAN...this quarry during the fall of 1943 when the newly organized Mineralogical Society of the District of Columbia...locality It was an old producing quarry at that time, and has probably been in operation for 45 or 50 years...years, for when collecting was being done in 1915 by Earl V. Shannon of the U. S. National Museum, the workings...were reported as being of considerable size. The quarry is located a mile and onehalf south of Virginia |
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| SOME MODES OF DEPOSITION IN BASIC WALDEMAR OF COPPER ORES ROCKS. LINDGREN. Coppermineralsare...The ores of this metal are particularlyfrequ. ent in basicigneous rocksand thispaperattemptsto classifysomeof...theseoccurrences. NATIVE COPPER WITH ZEOLITES IN OCCURRENCE. BASIC LAVAS: GENERAL Copper minerals...are often foundin flowsof basiclavas,mostlybasalts. In many such cases the ore minerals are associated...stilbite, chabazite,and laumontite, and the minerals prehnite and datolite; together with these calcite, quartz |
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| zeolite and related minerals. Localities of thls type in New Jersey and neighboring states provided consistently...Consequently, most collectors are familiar with prehnite, typically as pale green botryoidal or reniform...Virginia. Recently, however, extraordinarily fine prehnite specimens have appeared on the collector market...for its most famous locality, Tsumeb. One such prehnite specimen has been nominated for this issue’s Connoisseur’s...Connoisseur’s Choice (see fig.). Prehnite is best known in shades of green that vary from pale to very |
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| existence of ramp-faults, still remains unproved in Palestine. I am sorry to have to abide by my conclusion...Gilboa north-west border has for the same reason as in (2) no ramp character. A totally normal succession...Gilboa (1928-9). With regard to the different origin in time of the dislocations I believe strongly that...origin. Thus in the memoir explanatory of sheet 7, scale 1 inch = 1 mile, published in 1869, it is stated...attaching to the altered strata of this district consists in the fact that they exhibit certain arrested |
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| Zeolites and prehnite have been found in North Carolina in a wide variety of excava tions for power...pits, pipelines, and shopping centers. ZEOLITES IN NORTH CAROLINA D O N A L D R. P R I V E T T One Circle...their esthetic groupings. Due to their importance in technological applications, zeolites have been studied...ever-expanding uses (Hawkins and Mumpton, 1976). Occurrences In most of the classic source areas, such as India,...zeolites oc cur in gas formed cavities in basalts. They are also found as extensive deposits in altered volcanic |
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| encouragement, finacial assistance and occasional kick in the posterior to keep us going. And to DAD, who unfortunately...Vincent and Jerry Furia of "Fur:y Camera & Sound" in Dumont, New Jersey for their technical assistance...complex and misunderstood A mineral group that is found in all of the major rock types primarily as secondary...be formed when crystals volcanic occurring form in igneous of the surrounding igneous rocks deposit...group! waters area. and come in In sedi- weathered out of muds in fresh water lake bottoms. Zeolites |
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| FIRST IN A SERIES ON EAST COAST TRAPROCK QUARRIES riassic Traprock Minerals of EW J E R S E Y JOSEPH...localities in New Jersey. This article focuses on the Bergen Hill occurrence in the Palisades diabase and five...five quarries located in the First Watchung Mountain: Upper and Lower New Street quar ries, Paterson;...Brothers quarry, Prospect Park; McDowell's quarry, Upper Montclair; and the Francisco Brothers quarry, Great...Great Notch (Fig. 1). Several important diabase localities not covered include the intrusives be tween |
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| 45056 rakovajf@miamioh.edu Fluorapatite Acushnet Quarry Bristol County, Massachusetts N orth America...“Roebling apatite” from the Pulsifer quarry in Auburn, Maine. Formerly in the collection of Col. Washington...Smithsonian Institution and can be seen on display in the Janet Annenberg Hooker Hall of Geology, Gems...made Pulsifer the premier locality for fluorapatite in the United States (Wilson 1977; Francis and Dallaire...issue). The Connoisseur’s Choice for this issue is in my opinion, and the opinion of many others, another |
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| Valley with Emphasis on Reed's Gap Quarry near Durham Reed's Gap quarry, near Durham, Connecticut. Photo...exam ples of such associated minerals as calcite, prehnite, and several varieties of quartz. Through the...owners of quarries in the Connecticut Valley, we were able to make a rough survey in the summers of 1 >78...>78 and 1979 of minerals being found during quarry operations. (Ashland recently sold its interests to...Reed's Gap, Durham (Wallingford). In addition, the inactive quarries in Cheshire and Plainville were visited: |
