 | | Journal (issue) | | WASHINGTON November 3, 2007 9:00 am to 5:00 pm Clark County P. U. D. Building 1200 Fort Vancouver Way Vancouver...of Eugene, Oregon near the town of Trent in Lane County, Oregon, just southeast of Springfield/Eugene (Staples...Trent, Lane County, Oregon Fig. 5 Yellow orpiment needles in chalcedony, Trent, Lane County, Oregon Fig...realgar needles, Royal Reward mine, Green River, King County, Washington Fig. 6 Yellow orpiment coating red...covered with colorless chalcedony. Trent, Lane County, Oregon. Fig. 7 Hollow needles, formerly realgar |  | | Report (volume) | | Livingston Group on the West Edge of the Crazy Mountains Basin, Montana GEOLOGICAL SURVEY BULLETIN s Ci...Livingston Group on the West Edge of the Crazy Mountains Basin, Montana By BETTY SKIPP and L. W. McGREW CONTRIBUTIONS...Livingston Group on the west edge of the Crazy Mountains Basin, Montana. (Contributions to stratigraphy) (Geological...Volcanic ash, tuff, etc.-Montana-Crazy Mountains. 3. Geology-Montana-Crazy Mountains. I. McGrew, Laura Wenger.......................... Relations to Elkhorn Mountains Volcanics ................................... |  | | Journal (article/letter/editorial) | | Montana Mineral Locality Index Downloaded by [University of Nebraska, Lincoln] at 20:00 09 April 2015...2015 K NOWN AS THE TREASURE STATE, Montana is rich in mineral and gemstone localities. The state motto...The middle third of the state is known as the Montana alkali province where the sediments have MICHAEL...Indian Queen mine ca. 1905 at Farlin, Beaverhead County. 208 ROCKS & MINERALS Downloaded by [University... the Rocky Mountains, and furthest to the northwest, the belt basin. The Rocky Mountains contain sedimentary |  | | Journal (article/letter/editorial) | | VULCANISM, AND OROGENY IN BEARTOOTH MOUNTAIN REGION, MONTANA, BY HEAVY MINERALS BY MARCELLUS H. STOW CONTENTS...Sketch map of the area north of the Beartooth Mountains, Montana Page 677 Plate Facing page 1.—Geologic...Fish Creek, Wheatland Co., to Roscoe, Carbon Co., Montana 686 ABSTRACT The results of this project represent...the Bighorn Basin and Crazy Mountain syncline regions of southeastern Montana. 675 Downloaded from https://pubs...Lebo No. 2, and Melville, respectively, in the Crazy Mountain syncline. '.•'"': A series of agglomerates |  | | Report (issue) | | History of the Livingston Area, " Southwestern Montana By ALBERT E. ROBERTS GEOLOGY OF THE LIVINGSTON...Tectonic map of the Crazy Mountains basin and adjacent areas of southwestern Montana. FIGURE 1. Index maps...rocks of the Livingston area with other areas in Montana and VVyorn~ng---------------------------------...Group in relation to the Crazy Mountains depositional basin and the Elkhorn Mountains source area in southwestern...southwestern Montana _______________________________ _ 15. Index map showing locations of measured units |  | | Conference Paper/Abstract | | associated alkaline rocks from Gordon Butte, Crazy Mountains (Montana) Roger H. Mitchell (Lakehead University)...Alkaline igneous rocks of central and western Montana (U.S.A.) exhibit a great petrographic diversity...Alkaline parageneses of different provenance from Montana have been shown to contain a variety of rare minerals...Mitchell 1999). Igneous lithologies of the Crazy Mountains area include a subalkaline series (gabbro-diorite-granite)...assemblages from the Gordon Butte area, northern Crazy Mountains. At Gordon Butte, four major intrusive series |  | | Journal (article/letter/editorial) | | alkaline pegmatites from Gordon Butte, Crazy Mountains (Montana, USA): comparisons between potassic and sodic...Springer-Verlag 2002 Abstract At Gordon Butte (Crazy Mountains, Montana), agpaitic nepheline±syenite pegmatites...Butte rocks is from Fe-poor diopside to aegirine±augite in the malignites and nepheline microsyenites,...Alkaline igneous rocks of central and western Montana (USA) exhibit great petrographic diversity, and are...Alkaline parageneses of dierent provenance from Montana have been shown to contain a variety of rare minerals |  | O'Brien, Hugh E., Irving, Anthony J., McCallum, I.S., Thirlwall, Matthew F. (1995) Strontium, neodymium, and lead isotopic evidence for the interaction of post-suhduction asthenospheric potassic mafic magmas of the Highwood Mountains, Montana, USA, with ancient Wyoming craton lithospheric mantle. Geochimica et Cosmochimica Acta, 59 (21) 4539-4556 doi:10.1016/0016-7037(95)99266-j | Journal (article/letter/editorial) | | potassic mafic magmas of the Highwood Mountains, Montana, USA, with ancient Wyoming craton lithospheric...Sciences, University of Washington, Seattle, WA 98195, USA *Department of Geology, Royal Holloway University...potassic malic rocks of the Highwood Mountains in Montana, USA, share many petrographic, major element...voluminous Eocene mafic magmatism throughout central Montana may have been triggered by foundering and southwestward...and Bergman, 1991). In the Highwood Mountains of central Montana previous work (Larsen et al., 1941; |  | | Journal (article/letter/editorial) | | HASTINGSITE IN THERALITE FROM THE CRAZY MOUNTAINS, MONTANA Jonn E. Worlr, Pasadena,California. Among...Among the many occurrences of theralite in the Crazy Mountains, amphibole occurs in notable amount only in...glittering plates of biotite, long black prisms of augite, and white feldspar and nepheline. Olivine is also...biotite, augite, amphibole, nepheline, and feldspar. The pyroxenes have cores of diopsidic augite, grading...grading outward through aegirite-augite to aegirite. The peculiar orthoclase in the theralites has over one |  | | Journal (article/letter/editorial) | | RELATIONS FORMATION OF THE OF LIVINGSTON MONTANA. PART II. R. W. AREA BETWEEN Between Stillwater...had been separatedby Weed into the Coloradoand Montana groups,about half of the total thicknessbeing assignedto...Western Ontario user LIVINGSTON FORMA7101q OF MONTANA. 653 Inoceramussp. Fragmentsof a thick-shelled...two of them have been found at many localitiesin Montana and the third-that is Scaphitesvermiformis--thoughrare...a commonform in the Colorado of the state of Montana. Sincethis collectionwas madefrom a horizon300 |  | | Report (volume) | | formation-............................................. Montana group .................................................................................... 77 Crazy Mountain types. ..................................porphyry.............................................. Crazy Mountain rocks.............................................................................. 110 Augite-vogesite.........................................Topographic map of the Castle Mountain district, Montana..... II. Castle Mountain from the south, showing |  | | Journal (article/letter/editorial) | | mantle: isotopic evidence from the Shonkin Sag sill (Montana) Received: 1 November 2001 / Accepted: 27 October...published analyses for magmas of the Cenozoic Wyoming-Montana alkaline province (WYMAP) provide evidence of an...resembles a subduction imprint on Cenozoic southwestern USA basalts (SWUSAB). However the latter give Proterozoic...investigation. Introduction Extension-related south-western USA basalts (SWUSAB) have a geochemical signature which...lithospheric mantle (SLM) below the south-western USA (Fitton et al. 1988; Lum et al. 1989; Fitton et al |  | | Report (issue) | | composition of rocks of Y ogo Peak, Little Belt Mountains, Montana. i In 1896 Becke.i represented the chemical...-------- 79.25 Porphy&y ............. Harz Mountains ...................... R. T., 1861, i. 0. 057...062 .07~ . 085 .080 . 079 Blowing Rock, Watauga County, N.C. Fichtelgebirge, Bavarht .............. Crystal......... Montgomery County, N.C ............ Granitite ............. Eldorado County, C11l ..............Zealand ..... Alaskite .............. Tordrillo Mountains, Alaska ......... (.078) Qu~trtz-porphyry ... |  | | Journal (article/letter/editorial) | | AbssAn45,accompanied by biotite, magnetite, and augite, imbedded in a glassy matrix. The dike rock likewise...consists essentially of phenocrysts of biotite, augite, olivine, and plagioclase, imbedded in a groundmass...Mancos River, which includes much of the LaPlata Mountains northeast from Mancos. It is believed, however...inclusions all appear to be surrounded by a wreath of augite prisms about I mm. wide, characteristic of quartz...diabase and the quartz: (i) diabase feldspar, (2) augite crystals, (3) potash feldspars, (4) micropegmatite |  | | Journal (article/letter/editorial) | | u s t 8 , 1892 T H E GEOLOGY OP T H E CRAZY MOUNTAINS, MONTANA. BY J. E. WOLFF. ( R ead before the Society...450 450 T opog raphy . The Crazy mountains are situated in central Montana, centering about latitude 46°...Rocky mountains, lying about 30 miles east of the easterly border of the main mass of the mountains, and...southern end a few miles after its exit from the mountains at the lower canyon, and the range is there fore...miles eastward from the town of Livingston. The mountains trend a little west of north and are about 40 |  | | Report (volume) | | Tectonic Structures of the Stillwater Complex Montana By W. R. JONES, J. W. PEOPLES, and A. L. ROWLAND...rocks on the northeast margin of the Beartooth Mountains -UNITED STATES GOVERNMENT PRINTING OFFICE WASHINGTON...harzburgite; B, "Grating structure" thin layers of augite in anorthosite.________________________________________...TECTONIC STRUCTURES OF THE STILLWATER COMPLEX, MONTANA By W. E. JONES, J. W. PEOPLES, and A. L. HOWLAND...on the northeast margin of the Beartooth Mountains in Montana. According to the scheme of subdivision |  | | Report (volume) | | | and | the overlying Livingston formation in Montana | by | Walter Harvey Wood | with | report on flora...| and | the overlying Livingston formotion in Montana | by | Walter Plarvey Weed | -\vith | report on...| and | the overlying Liviugston formation in Montana | by | Walter Harvey Weed | with | report on flora...chief topographer. XXIII. Geology of the Green Mountains in Massachusetts, by Raphael Pumpelly, J. E. Wolff...themeridian of 76° 30', from Tompkins County, Now York, to Bradford County, Pennsylvania, by Henry S.Williams |  | | Journal (article/letter/editorial) | | REVIEWS. Eruptive Rocks from Montana. Acad. Sci. Ser. 2, Vol. 3. By WALDEMARLINDGREN. Proc. Cal. 189o...189o. A Sodalite-Syen ite and other Rocks from Montana. By W. LINDGREN, with analyses by W. H. MELVILLE... April 1893Acmite- Trachyte from the Crazy MIountains, Montana. By J. E. WOLFF and R. S. TARR, Bull....occurring in the eastern portion of the Rocky mountains and the region immedir ately east of it. This...rocks of Montana along the All of the rocks described frontal ranges of the Rocky mountains. occur as |  | | Journal (article/letter/editorial) | | III. AND THE THE MONTANA. W. R. CRAZY Sixteenmile CALVERT. MOUNTAINS. Creek and Musselshell...fossils seem to be more closely related to the Montana group fauna than to that of the Colorado, and thus...shouldincline to regard it as probablynot older than Montana. About one-eighthmile west of Summit and 3o0 to...tuffaceousor Livingstonbedson the westsideof the Crazy Mountains. The collectionsjust enumeratedare freshand...the Montana age of the lower portion of the Livingston forma- LIVINGSTON FORMATION OF MONTANA. 743 |  | | Journal (article/letter/editorial) | | normal fault in the railroad cut near Yardley, Bucks county, Pa., had seeming importance from a mistake, through...fault rock of the Chalfont railroad cut, Bucks county, Pa., formerly supposed to fill confusedly a fault...scale. U. S. Geologic Atlas, Folio I, Livingston, Montana, 1894. This folio consists of three and one-fourth...and of latitude 45° It is within the state of Montana, embraces 3340 square miles. including portions...features are the Snowy Mountains, Gallatin Range, Bridger Range, Crazy Mountains, and Yellowstone Valley |  | | Journal (article/letter/editorial) | | Austin, TX 78713, USA 2 United States Geological Survey, Menlo Park, CA 94025, USA Abstract. Alkalic...Geophysics, The University of Wyoming, Laramie, WY 82071, USA Late Miocene and Pliocene basalts of the Hickey...altered olivine and sector-zoned Ti-augite in a groundmass of apatite, augite, alkali feldspar and titanomagnetite...contain phenocrystic olivine accompanied by zoned Ti-augite phenocrysts in the case of the most evolved AOB... Their grouudmasses are primarily plagioclase, augite and titanomagnetite with rarer apatite, alkali |  | | Journal (article/letter/editorial) | | THE LEBO SHALE MEMBER OF THE FORT EASTERN MONTANA UNION FORMATION IN General statement.-During...United States Geological Survey an area in eastern Montana known as the Little Sheep Mountain coal field'...described on Lebo creek in the vicinity of the Crazy Mountains,' about 175 miles west of the Little Sheep...covers considerable areas west and south of the Crazy Mountains. This intercalated fan extends 'R. W. Stone..."Stratigraphic Relations of the Livingston Formation of Montana," Econ. Geology,V, No. 6, September, 1910, p. 752 |  | | Book | | ROADSIDE % JEOLOGY of Montana David Alt and Donald W. Hyndman ROADSIDE N JEOLoGY of Montana David Alt Donald...Roadside geology of Montana. Bibliography: p. Includes index. 1. Geology — Montana — Guide-books. I. Hyndman...know something about the rocks and landscapes of Montana. We hope our professional colleagues will enjoy...dealing with the four major geologic provinces in Montana. Each starts with its own more specific narrative...Nearly every geologist who has ever worked in Montana contributed something to this book. We read almost |  | | Journal (article/letter/editorial) | | PUBLICATIONS. 85I carry phenocrysts of olivine and augite, but none of feldspar. The groundmass is extremely...upon the mutual interference of the phenocrysts of augite and olivine, namely, that it " can be accounted...phenocrysts of plagioclase in addition to those of augite and olivine, and have a groundmass in which orthoclase...sodalite-syenite of Square Butte, Highwood Mountains, Montana, as pointed out by Professor Merrill. The...referred in his article. J. P. I. Highwood Mountains of Montana. By WALTER H. WEED and Louis V. PIRSSON |  | | Report (issue) | | MUSSELSHELL VALLEY, MUSSELSHELL, MEAGHER, AND SWEETGRASS COUNTIES, MONTANA. By C. F. BOWEN. INTRODUCTION...lying chiefly in Tps. 7 to 9 N., Ks. 12 to 23 E. Montana principal meridian. It extends from the town of...both plains and mountains. To the north are the Big Snowy and Little Belt mountains, and on the west...west and southwest are the rugged, snow-clad Crazy Mountains. Within the area described, however, the surface...and likewise become more continuous toward the mountains. This absence of abrupt and extreme surface irregularity |
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