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| Triassic 40Ar/39Ar age for a camptonite dyke in Cambridge, Massachusetts, USA Martin E. Ross Department...Northeastern University, Boston, Massachusetts 02115, USA Date received: 28 November 2009...ABSTRACT A 2.4 m-thick megacryst- and xenolith-rich camptonite dyke briefly exposed during excavation of a subway...1983, 1990), one of these dykes is classified as camptonite, based on mineralogy (kaersutite and biotite...to as the Porter Square camptonite. The age of the Porter Square camptonite has not been es- Atlantic |
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| CAMPTONITE DIKES NEAR BOULDER DAM,1 ARIZONA' faN Cal,rpeplr* ANo Enwanr T. ScuBNx** Arsrnncr Near...Near Boulder Dam occur camptonite dikes of possible Quaternary age characterized by disamphibole (kaersutite)...volatiles in the dike magma. Chemical analyses of the amphibole and of the chilled margin of a dike are presented...presented and discussed. INrnooucrroN Camptonite dikes occur within a limited area bordering U. S. Highway...uncommon character. 3. Composition: the rock is a camptonite and the amphibole most nearly resembles kaersutite |
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| Aschaffenburg, Germany Somerville, Massachusetts Ogunquit, Maine Rossland, British Columbia Little Belt Mountains...whether of greater specific gravity than the molten dike-rock or not, because they are forced upward by the...caught in the ascending magma. In rare instances a dike may ascend through a fault breccia and thus acquire...walls near the place where they are frozen in the dike. The inclusions are now nearly weathered out of...Massachusetts: At Pigeon Cove, Cape Ann, is a labradorite porphyry dike of very coarse grain, 25 feet wide and |
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| and classification in the quantitative system. Camptonite (ourose ( ? ) ) ...............................the occurrence of granite-felsophyre in Alleghany County, Virginia, and several dikes of basalt near the...the State line on the north, in Pendleton County, West Virgima. Recent investigations by the writers, assisted...four new types—quartz gabbro, nepheline syenite, camptonite, and teschenite (feldspar monchiquite)— occurring...study includes the discovery and location of every dike or exposure of igneous rock within the lim its of |
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| crystalline rocks................................... Maine. ....................................................................... 1. Rocks from Aroostook County..... ^..................'........... 2. Miscellaneous...Elliott County dike............................................... 2. Crittenden County dike.......:....................................... 3. Colfax County................ I................................142 3. Plumas County............................................... 144 4. Butte County.............. |
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| of Leadville, Colorado, with atlas, by Samuel Franklin Emmons. 1886. 4°. xxix, 770pp. 45 pi. and atlas...meridian of 76° 30', from Tompkins County, New York, to Bradford County, Pennsylvania, by Henry S. Williams...cents. 16. On the Higher Devonian Faunas of Ontario County, New York, by John M. Clarke. 1885. 8°. 86pp. 3...57 pi. Price 25 cents. 38. Poridotite of Elliott County, Kentucky, by J. S. Diller. 1887. 8°. 31pp. 1 pi...Brief review of the classification of the basic dike rocks.................. Local geological details |
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| Mineralogy by Vandall T. King and Eugene E. Foord Maine Geological Survey DEPARTMENT OF CONSERVATION Walter...Resources Information, Maine Geological Survey Walter A. Anderson, State Geologist Maine Geological Survey...DEPARTMENT OF CONSERVATION 1994 Copyright ©1994 by the Maine Geological Survey, Department of Conservation. All...photograph: Fluorapatite, Pulsifer quarry, Auburn, Maine (2.2 cm specimen), Harvard Mineralogical Museum...Wendell E. Wilson, ©1985. The laws and policies of Maine and the United States prohibit discrimination in |
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| of igneous and crystalline rocks Maine 1. Rocks from Aroostook 'County 2. Miscellaneous rocks5 v New Hampshire...Carolina Georgia Kentucky 1.. Elliott County dike 2. Crittenden County dike Tennessee Missouri Arkansas Oklahoma...Grande Canyon 5 2. Mount Taylor region 5 3. Colfax County 4. Miscellaneous rocks 5 Arizona 1. Globe district...Plumas County 4. Butte County 5 5. Sierra County5 6. Nevada City and Grass Valley 5 7. Placer County 8. Eldorado...Eldorado County 5 9. Amador County 5 10. Calaveras County5 11. Tuolumne County 5 12. Mariposa County5 |
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| ABSTRACTS SEVEN NEW BARIUM MINERALS FROM FRESNO COUNTY, CALIFORNIA EASTERN CaliJornia Dilision Joux...silicate minerals have been found in eastern Fresno County, California. The minerais occur in sanbornite-bearing...lead-pyrochroite occurrences at L6,ngban, Sweden, and Franklin, New Jersey. THE ORIGIN OF TINCAI,CONITE AT...andalusite. A UNIQUE OCCURRENCE OF URANIUM SAGUACHE COUNTY, MINERALS, COLORADO MARSHALL PASS, E. B. Gnoss...uncovered in the Marshall Pass district, Saguache County, Colorado. Two of the ore bodies occurred in alluvium |
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| ............................................ Camptonite..................................................................................... Origin of dike fractures.........................................0.1 per cent of the exposed bedrock. The largest dike is 60 feet wide and is exposed discontinuously for...presumably a part of the same dike (PI. 1). Apparently this same dike reappears north of the limits of...FOWLER-BILLINGS— IGNEOUS DIKES Each point represents a dike, and the lithology of each is indicated by an appropriate |
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| .................... ^................ 19 19 Maine.............................................................. 1. Eocks from Aroostook County I............................. 19 19 2. Litchfieldite and...1. Elliott County dike........................................ 56 2. Crittenden County dike................................................. 3. Colfax County......."............................................... 3. Plumas County .............................. .............. 4. Butte County................ |
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| Mountain Screen R a ttle s n a k e Dike Rattlesnake. Di ke Mt.Major Dike SECTION A-A’ J o y Hill O uter...uter F ram e Mt. Major Dike Central Stock Mt.Major Dike SECTION B-B’ Vertical and Horizontal Scale ...B E L K N A P M O U N T A IN S R attle sn ak e Dike B U L L ET IN O F T H E G E O L O G IC A L S O.................................................. Dike-rocks................................................................. Rattlesnake composite ring-dike................................................ |
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| Analyses Igneous and crystalline rocks Maine 1. Rocks from Aroostook County 2. Litchtieldite and associated...Carolina (ieorgia Kentucky 1. Elliott County (like 2. Crittenden County dike Tennessee Missouri Arkansas Texas...Grande Canyon 2. Mount Taylor region 3. Colfax County 4. Miscellaneous rocks Arizona 1. Globe district...Butte County 5. Sierra County 6. Nevada City anti (lras Valley 7. Placer County 8. Eldorado County 9. Amador...Amador County 10. Calaveras County 11. Tuolumne County 12. Mariposa County 13. The quicksilver region |
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| .. 30—Pegmatite dike cutting granite-gneiss, Bull Hill, Grafton, Vt 31—Djabase dike cutting Bellows Falls...in Canada and others east in New Hampshire and Maine. (In Professor Wolff's article, page 137 of this...and those in Vermont, as well as those in Canada, Maine, and New Hampshire are enumerated in Professor Wolff's...Devonian folding that affected New Brunswick and Maine so strongly appeared only as an uplift in western...Vermont and adjoining areas are numerous dikes of camptonite, and similar rocks. These have a marked trend |
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| stock ....................... Great syenite-porphyry dike of Little Ascutney Mountain......... Syenite stock...syenites.....-...-.--------..--.............. Paisanite dike cutting the Main stock ...........................of the Main stock...................... Paisanite dike on Little Ascutney Mountain.......'...............in alkaline hornblende, from the large paisanite dike on northwest slope of Ascutney Mountain -._....______...bilateral, as in the case of many batholiths and great dike-like intrusions; or, finally, irregularly divergent |
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| series General statement Plutonic rocks Alkaline dike rocks Optical and chemical properties of minerals...and stocks Cape Horn ring dike Parks Brook ring dike Devils Slide ring dike Pilot Range complex Hastingsite-riebeckite... granite ring dikes Conway biotite granite ring dike Screens Syenite stock Hastingsite-riebeckite granite...in the northern part of New Hampshire within the county of Cob's, and includes the whole or portions of...accessible from the south by means of the Boston and Maine Railroad, and from the southeast and northwest by |
 | | Catalog/List |
| Fairfield County, Branchville White xlline with cymatolite, good study ... New Mexico Taos County, near Dixon...cerium aluminum silicate California Los Angeles County, Pacoima Canyon Large black tabular crystals in...iron silicate ACTINOLITE California San Bernardino County, Wrightwood Green prismatic crystalline mass ....CROSSITE Sodium iron silicate California San Benito County, Gem mine Compact blue-gray mass with natrolite...sodium potassium alumino-silicate Arizona Final County, Christmas Dark green cleavages in andesite .. |
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| .................. 11A 12A 13A 14A Granite, Franklin, M e...................... . . . . Quincy granite........................... . Tholeiite, Cleveland dike..................... . Hornblende granodiorite....................................... . Somerset County diabase...................... . 18B Virginia............................................... Camptonite, Burlington, V t.................. 35B Wutchumna............. ............... 1.42 1.52 Granite, Franklin, M aine............................... ...... |
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| x922. No. 7 ORIGIN OF THE ZINC ORES OF SUSSEX COUNTY, N.J. * H. R• AND W. C. BOWE•I. CONTENTS. PAGE...outputof two minesin Sussex County--the one at Mine Hill, near Franklin, and the other at Sterling Hill...Hill, near Ogdensburõh,three miles from Franklin. For a numberof years precedingI9I 3 the Sterling Hill...previousefforts. In view of these achievements,the Franklin mine must be rated oneof the greatestzincminesin...University user ORIGIN OF ZINC ORES OF SUSSEX COUNTY, N. J'. 519 work, mostly underground,was carried |
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| GRAVIMETRY OF THE MUSTANG HILL LACCOLITH, UVALDE COUNTY, TEXAS ROBERT GREENWOOD AND VANCE M. LYNCH ABSTRACT...known in Texas from Kinney 807 County on the west to Travis County on the east, with the greatest variety...variety and concentration in Uvalde County (Fig. 1). Most of them are plugs of nepheline basalt and related...Oil Company of Houston. This grant also paid for COUNTY Mustang Hill [V] IGNEOUS TERTIARY FAULT FIGURE...geophysical investigation. Sayre (1936) mapped Uvalde County on a reconnaissance scale. The classic report on |
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| 000 years ago as the ice was leaving. j: - • FRANKLIN 'Z_____ CLINTON Albons Cit PlottsburghC -----... and a larger swarm of over 150 monchiquite, camptonite and trachyte (mostly bostonite) dikes in the...petrographic and geochemical descriptions of the dike rocks. Our studies have been integrated with related...Hill stock, a small syenitic complex (Fig. 1) . Camptonite dikes are present throughout both subgroups,...Early Cretaceous time. Tectonic implications of dike-stress relationships in New England have been discussed |
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| isotropic and partly of poecilitic plates of labradorite (An65_5o) with a little nepheline. One's first...and partly of laths and poecilitic plates of labradorite (An7o_65) averaging about o-i mm. across, with...skeletal magnetite, and a few ragged microlites of labradorite partly replaced by analcime. One of these [Q...and olivine up magnetite. The plagioclase a labradorite Angs with the usual more acid skin and is to...of olivine; e.g. [768], Dike, S. Pedro lighthouse, S. Vicente, [Q.A27], Dike, Hayden's Retreat, Mindelo |
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| of quartz. Phenocryst feldspar is generally labradorite; groundmass feldspar is andesine. An average...augite with olivine, west for outcrops extending labradorite, and magnetite in about equal proportions forming...Mitchell anticline. few basalt dikes composed of labradorite (AnQ Q), and pigeonite with minor olivine and...east or northeast, in the vicinity of the Monument Dike Swarm (Thayer, 1957; Waters, 1961). The basal parts...igneous activity in the Mitchell quadrangle, Wheeler County, Oregon: Ore Bin, v. 34, p. 104-110. Evernden, |
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| ENGLAND (CNE) AND ATLANTIC CANADIAN MAGMATISM 1. Mafic Dike Suites Within Mesozoic Igneous Provinces of New...Significance of Mesozoic Dikes in Southern Coastal Maine . Mark T. Swanson 37 4. Petrology and Tectonic...along southern coastal Maine that are associated with the Agamenticus complex of Maine. Swanson interprets...that fed the initial ENA magma pulse (the Higinum dike) is projected into southeastern New Hampshire by...by Sundeen and Huff (Chapter 5) as the Onway dike. In Chapter 9 Jaroslav Dostai and J. Greenough provide |
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| Dorset Mountain, Danby, showing joints near trap dike...................................... XI. Memorial...in Franklin County, and the black calcite marble quarried on Isle la Motte, in Grand Isle County, are...State, in Washington County, and the chrome mica schist of Shrewsbury, in Rutland County, have also been included...including the small disused quarries in Orange County, are not here considered. The field work was done...important papers by Prof. Perkins on the geology of Franklin and Chittenden counties and the formation to which |
