 | | Journal (article/letter/editorial) | | granite .. . . . Aplite and fine-grained granite . . Diabase Injection gneiss . Paleozoic and Mesozoic sediments...443 446 Assrnacr The Eight Mile Park pegmatite district, three to twelve miles west of Canon City, Fremont...feet in altitude, that is bisected by the Royal Gorge of the Arkansas River, rvhich is nearly 1200 feet...Idaho Springs formation, consists chiefly of muscovite schist with minor biotite schist and quartzite... The youngest pre-Cambrian rocks are dikes of diabase. Veins are not common. The injection gneiss was |  | | Report (issue) | | OF THE INTERIOR GEOLOGY OF THE HANOVER-YORK DISTRICT PENNSYLVANIA GEOLOGICAL SURVEY PROFESSIONAL PAPER...surface of recumbent fold in albite-chlorite-muscovite-quartz schist, 7 miles northwest of Tucquan anticline;...anticline; B, Fold in albite-chlorite-muscovite-quartz schist; C, Muscovite-chlorite-quartzs chist, from Muddy...Muddy Creek Forks; D, Albite-muscovite-chlorite schist, from Fenmore ________________________________________... A, Muscovite-chlorite schist with quartzose lenses; B, Coarse-grained albite-chlorite-muscovite schist; |  | | Book | | derives its name from the saltmining district of Hallstatt in Upper Austria, where many prehistoric finds have...cordierite, sillimanite, augite, hornblende, talc, muscovite, blotite, chlorite, serpentine, clay minerals...norne basalt gabbro*dolerite (diabase) porphyry *melsphyre dolerite (diabase) olivine augne hornblende...sources of many minerals, such as the feldspars, muscovite, beryl and gemstones. If the residual melts contain...striations (cp. Fig. 16, p. 93). Habachtal, Salzburg, Austria. Center left Iron cross twin of pyrite. Below left |  | | Journal (article/letter/editorial) | | Siderite Siete Suyos Mine, Atocha-Quechisla District Sud Chichas Province, Potosí Department, Bolivia...museum recently, I have come to realize that, like muscovite (which I will feature at a later time), siderite...siderite from Siete Suyos mine, Atocha-Quechisla district, Sud Chichas Province, Potosí Department, Bolivia...rhombohedra have been found in basalt, andesite, and diabase. It is a rare constituent of mica schists but is...found as iridescent microcrystals; the Duquesne district, Santa Cruz County, as curved rhombohedra; and |  | | Report (issue) | | A, Triassic sandstone bridge; B , }fa.sse.s of diabase at "Governor's stable" near Falmouth . . . . ..... 170 A, Quarry of Universal Gypsum & Lhne Co. in ,vest York; B, Calico rock in same quarry . . . . ...Bittinger Co. quarry, Spring Grove . . . . . . . . . . . . . . . . . . . . . . . . . 173 Quarry of York Valley...Folded layer of s-andy Peach Bottom slate; B, Diabase quarry at Yorkhaven . . ..... . .... . . .. . .. ...resistant conglomerate beds and large bodies of diabase are so resistant that much of the surface of the |  | | Report (issue) | | Howard, and Anne Arundel Counties, Maryland and the District of Columbia By Avery Ala Drake, Jr. 1 Open-File...HOWARD, AND ANNE ARUNDEL COUNTIES, MARYLAND AND THE DISTRICT OF COLUMBIA By Avery Ala Drake, Jr. INTRODUCTION...are in Howard and Anne Arundel Counties, and the District of Columbia. Most of the area is suburban, and...quartz and plagioclase and lesser biotite and muscovite. The rock has the composition of graywacke and...characteristically contains abundant flakes of coarse muscovite. The schist contains scattered beds of meta-arenite |  | | Report (volume) | | ................... Iron ores of the Richmond district............................. Eastern Massachusetts............................................ 185 Diabase (greenstone)........................................................................ 205 205 Diabase dikes......................................................................................... Diabase........................................................ Talcott diabase .............................................. Holyoke diabase............... |  | Lyttle, Peter T., Aleinikoff, John N., Burton, William C., Crider, E. Allen, Drake, Avery A., Froelich, Albert J., Horton, J. Wright, Kasselas, Gregorios, Mixon, Robert B., McCartan, Lucy, Nelson, Arthur E., Newell, Wayne L., Pavlides, Louis, Powars, David S., Southworth, C. Scott, Weems, Robert E. (2017) Geologic map of the Washington West 30’ × 60’ quadrangle, Maryland, Virginia, and Washington D.C. Open-File Report 2017-1142. US Geological Survey doi:10.3133/ofr20171142 | Report (issue) | | Zcm Zcb Tn Tc Qbc Ta Qhm Og* Ocf* Mather Gorge Formation Zfcr Qsh Qts 427–440 Ma; 448±4 Ma...(180 ft) in Maryland and 117 m (384 ft) in the District of Columbia. Layers with phosphatic sand grains...microcline, and biotite with lesser amounts of muscovite, opaque minerals, epidote, chlorite, and rare...metatuff has a typical mineral assemblage of muscovite-quartz-biotite-chlorite (-plagioclase-magnetite-epidote)...mineral assemblage quartz-plagioclase-epidote-muscovite-biotite-chlorite-green-amphibole-magnetite. The |  | | Report (volume) | | weathered surface of Vintage dolomite in limestone quarry southwest of Emigsville ____ 18 CONTENTS . ... A, Large quarry in diabase at Yorkhaven; B, Baked shale within 42 the intrusive diabase near base...Yorkhaven______ 9. A, Large tumbled masses of diabase that form the " Governor's 42 Stable"; B, Haldeman...of Mount Wolf quarry, Saginaw; B, Baked shale at lower contact of diabase sheet in quarry northeast of...of Lawn. _ 14. A, Quarry in thick-bedded Triassic red sandstone at Waltonville; B, Large dimension stone |  | | Book | | Lower Miocene columnar basalt in the Narre Warren Quarry, near Melbourne, Australia. The minerals are believed...incorporated into the micaceous minerals lepidolite and muscovite. Other primary PEGMATITE S • • • PEGMATITES...HEXOCTAHEDRON {345} TRISOCTAHEDRON {233} BOYLSTONE QUARRY, BOYLSTONE QUARRY GLASGLOW, SCOTLAND, U.K. GLASGLOW, SCOTLAND... across, with cube faces from the Magheramore Quarry, Lame, County Antrim, Northern Ireland, U.K.; SEM...Hill Quarries, near Parramatta, in the Sydney district (Chalmers, 1968). It also forms colorless, transparent | | | Book | | Lower Miocene columnar basalt in the Narre Warren Quarry, near Melbourne, Australia. The minerals are believed...incorporated into the micaceous minerals lepidolite and muscovite. Other primary PEGMATITE S • • • PEGMATITES...HEXOCTAHEDRON {345} TRISOCTAHEDRON {233} BOYLSTONE QUARRY, BOYLSTONE QUARRY GLASGLOW, SCOTLAND, U.K. GLASGLOW, SCOTLAND... across, with cube faces from the Magheramore Quarry, Lame, County Antrim, Northern Ireland, U.K.; SEM...Hill Quarries, near Parramatta, in the Sydney district (Chalmers, 1968). It also forms colorless, transparent |  | | Journal (article/letter/editorial) | | districts in the Rocky Mountain area, and the inner gorge of the Grand Canyon of Arizona. Simple pegmatites(thosein...pp. 300-311. t6 Dolmage, Victor, Finlay River district, British Columbia:' Canad'ian l[i'n. TH E AM...Mesozoic age, probably Jurassic.2a Albite and diabase pegmatites of Triassic age occur in Virginia2s...pyrite-bearing pegmatites occur in the Triassic diabase of the Palisades.26Pegmatite dikes which are probably...region of France.27A pegmatitic ore deposit in Austria, of pre-middle Cretaceousage, has been describedby |  | | Report (edition) | | County, the Stillwell quarry in Lancaster County, and the Medusa Cement Company quarry in York County, are...Zircon Crystal 50 Diagramatic Sketch of Brinton Quarry Pegmatite 53 Geologic Cross-Section of West ...84 of Deweylite after Dolomite, Ceclar Hill Quarry 89 _ Limonite Pseudomorphs from Chestnut Hill...permission from the owners of the land, or from the quarry and mine operators, before entering to collect...have been taken from topographic quadrangles. A quarry or mine symbol designates the exact mineral location |  | | Report (issue) | | 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...Complex at Ilchester, Maryland. Figure 6. Triassic diabase dike forming a ridge north of Route 7 near Dranesville...« Serpentine variety picrolite from the Delight quarry, Delight, Maryland. Specimen is about 12 cm by...Maryland. Figure 17. Location of the Marriottsville quarry, Hernwood, Maryland. Figure 18. Marble (white) |  | | Report (edition) | | Crystal . . . . . . .. Diagra1natic Sketch of Brinton Quarry Pegmatite Graphic Granite Geologic Cross-Section...Pseudomorphs of Deweylite after Aragonite. Cedar Hill Quarry . . . . . . . Calcite Crystal Forms "Picrolite"... Q t9 Diabase intrusions 225 er ...permission from the owners of the land, or from the quarry and mine operators, before entering to collect...have been taken from topographic quadrangles. A quarry or mine symbol designates the exact mineral location |  | | Book | | Karl-Franzens-Universitat HeinrichstraBe 26 A-8010Graz Austria ISBN-13 :978-3-642-84642-7 DOl: 10.1007/978-3-642-84640-3...stretching 1500 km between Vienna and Graz in Austria and Genova in Italy. They resulted from the collision...Salzburg, Hellbrunner Str. 34 A-5Ol0 Salzburg, Austria FLISCH,M. Bruckfeldstr. 23 CH-3000 Bern, Switzerland...Salzburg, Hellbrunner Str. 34 A-5Ol0 Salzburg, Austria FRISCH,W. Institut fUr Geologie und Palaontologie...Salzburg, Hellbrunner Str. 34 A-5020 Salzburg, Austria HEINISCH, H. Geologisches Institut, Albertstr. |  | | Report (volume) | | _-_---___ Geology of the McCalls Ferry-Quarry ville district. ________________ Pre-Cambrian rocks of...Lower Cambrian rocks of the McCalls Ferry-Quarry ville district..-----._---_-_-..---------_----_---_-______...Continued. Geology of the McCalls Ferry-Quarryville district Continued. Paleozoic sedimentary rocks Continued...Cambrian rocks of the McCalls Ferry-Quarryville district Continued. Vintage dolomite.-________________-____-_-____Kinzers...____Triassic igneous rocks______--__-_____-----_--_--_---Diabase _________________________________________ Correlation |  | | Journal (article/letter/editorial) | | ............................................. Diabase dik es...........................................to lie in undeterm ined thickness beneath the diabase flows and associated rocks of the Keweenawan.*...Blackhoof and K ettle River valleys. Dikes of diabase occur and granitic dikes and bosses constitute...hornblende-biotite type, occasionally broken by diabase dikes and bosses of biotitic gabbro, are seen in...principal rock of the region. Finally, in another district with Little Falls as a center lies a series of |  | | Journal (article/letter/editorial) | | So., F.G.S. PLATE I. pHYSICAL FEATURES.-The district here described is that part of Devon lying between...Tamar valley is less than 50 feet above O.D. The district is largely covered by pasture, arable fields being...and soft rocks beyond and proceeds to dig a deep gorge. This commences with a 40-foot waterfall at Kitt's...was diverted into its present course and cut the gorge very rapidly. The Tavy rises on Dartmoor and flows...to Triassic times. 22 R. L. SHERLOCK, Our district has never been glaciated, consequently it is cumbered |  | | Book | | others, formed by low-grade contact metasomatism by diabase of shale, argillite, or slate. [Possibly Gk. adinos...agalmatolite meta. Term applied to massive varieties of muscovite (pinite), pyrophyllite, and steatite; in China...quartz and biotite altered to chlorite. [ Akenobe district, Tajima, Japan] (Kato in 1920) akerite ig. pluton...aggregate of albite; some specimens contain minor muscovite and quartz, [albite] (Turner in 1896) albitite...augite-calcic-plagioclase rocks, including diabase, diabase porphyry, and gabbro, in the Algauer Alps |  | | Report (volume) | | Valley............................... Courtland district ................................................................................ Fort Ridgely district.................................................................................... Vicksburg district ................................................Granite Falls district.................................................... Montevideo district.............qui Parle district................................................... Ortonville district .......... |  | | Book | | prisms with inclined top and bottom faces gypsum muscovite augite triclinic pairs of faces albite anorthite...an emerald green variety of muscovite. Physical properties as for muscovite (No. 13). Rare. Specimen from...from the Tyrol (Austria). 10 Biotite is the most common mica, named after the French physicist Biot. K(Mg...irregular tablets. Occurrence: Eifel (Germany), Carinthia (Austria), Norway (No. 10). 11 Zinnwaldite (lithium...S. Africa, USA, Fig. 12 from S. Rhodesia. 13 Muscovite (Muscovy Glass, Common Mica, Potash Mica), KAl2(OH |  | | | | Australia, at Mount Morgan Mine, from Chartres Towers district, from Hillgrove, from Hill End, and large production...U.S., nice bladed crystals occur in the Darwin district, Inyo County, California; also at Antimony Peak...California; and large crystals come from the Rand district, San Bernardino County. Long crystals at Manhattan...In U.S., very abundant in Tri-State lead-zinc district as cockscomb forms. Very excellent cockscomb crystals...found in schists at Mitterberg, Austria, and in the Trentino district, Italy. 40 Arsenopyrite (Metallic |  | | Book (edition) | | Chartres In Australia, at Mount Morgan Towers district, from Hillgrove, from Hill End, and large production...U.S., nice bladed crystals occur in the Darwin district, Inyo County, California; also at Antimony Peak...California; and large crystals come from the Rand district, San Bernardino County. Long crystals at Manhattan...U.S., very abundant in Tri-State lead-zine district as cockscomb forms. Very excellent cockscomb...found in schists at Mitterberg, Austria, and in the Trentino district, Italy. 3x : Arsenopyrite (Metallic |  | | Report (issue) | | ............ . Solitude granite (granite and muscovite-granite) .................................. ....-.- ~-- ---- ------ ·------- ·- · · ·- ·- - ·-Diabase _............... _.......... . . _...............Outcrop of fault breccia between limestone and diabase on the north side of Big J.ohnnie Gulch _____________...the occurrence of a mass of limestone in the · diabase of the foot wall. _______________ . . . . 8. Diagrammatic...-I GEOLOGY OF THE GLOBE I COPP~R By F. L. DISTRICT, ARIZONA. I RAN1ME. INTRODUCTION AND ACKNOWLEDGlUENTS |
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