 | | Journal (article/letter/editorial) | | m U.S.A Selective concentration of cesium in analcime during hydrothermal alteration, Yellowstone National...of fresh and hydrothermally 17. 1983) altered rhyolitic material in Upper and Lower Geyser Basins, Yellowstone...selectively concentrated in analcime. The Cs content of unaltered rhyolite lava flows, including those from...ranges from 2.5 to 7.6 ppm. The Cs content of analcime-bearing altered sedimentary rocks is as high as...content is as high as 180 ppm. Altered rhyolite lava flows which were initially vitrophyns. now contain |  | | Journal (article/letter/editorial) | | Miocene, and are rich in clinoptilolite and/or analcime. The deposits in Thrace are believed to have formed...transformation to 477 zeolites (clinoptilolite, analcime, chabazite, mordenite), silica (opal C-T), and...K-feldspar (Stamatakis 1989a, b). Clinoptilolite and analcime are the most abundant zeolites. There is an irregular...characterized by abundant clinoptilolite and/or analcime; and (3) a central zone containing boronbearing...and Vougioukalakis 1992; Kanaris 1989,1993). Rhyolitic to andesitic lavas occur throughout the islands |  | | Book | | yolcanies’.-= = 2 5 7s = eases fe es ee Rhombporphyry flows and ignimbrites ...o2 sy 5.3226) - % 2 3 6 aww ws... Res er wiPan oe See ah Ss ey pbc AND LOWER PROVENCE Ronse y Bae Se2 ...... . I, J pe h, REABVOUUCTIOUMEEME...ey ne ee eee Otrer=Alpine younger-volcanics of France =. ieee iccl hace nt rere Composition of the volcanics...Belgium, the Upper Rhine valley, the delta of the Rh6ne in southern France, the basin of the Guadalquivir...stable since the Hercynian orogeny. The Upper Rhine valley and the Rhone delta are formed by active graben |  | | Journal (article/letter/editorial) | | phillipsite; C1, clinoptilolite; Heu, heulandite; An, analcime; Lau, laumontite; Epi, epistilbite; St, stilbite;...Ma BP) gave rise to the emplacement of both lava flows and pyroclastites, covering an area of about...ignimbrites, and a series of small-scale pyroclastic flows. The following formations are recognized: a. Civitella...gray pumice, leucite and sanidine phenocrysts and lava fragments from the basement. 454 s~\ )\--d )...is a dark gray sillar with pumice, many rounded lava blocks, sedimentary lithics and mafic holocrystalline |  | | Report (issue) | | . . . . . . . . . . . . . . 71 Influence of Lava Flows on Fluid Flow . . . . . . . . . . . . . . . ...deformation and along edges of low-permeability rhyolitic lava flows. Alteration of the area affected, self-sealing...and has erupted more than 3700 km3 of pyroclastic flows during the three cataclysmic eruptions (Christiansen...sediments; light green—Lava Creek Tuff; pink—postcaldera rhyolitic lava flows; purple—Huckleberry Ridge...hot springs thin cap rock cover edge of rhyolite lava fractures elevated heat flow level of groundwater |  | | Report (issue) | | underlain by a crustal reservoir of partly molten rhyolitic magma. Precise leveling surveys throughout the...the Yellowstone Plateau's extensive Quaternary rhyolitic volcanism, associated tectonic activity, and consequent...which has experienced widespread basaltic and rhyolitic volcanism, gradually migrating northeastward with...the youngest caldera was largely filled by rhyolitic lava flows between 150,000 and 75,000 years ago. These...These voluminous, predominently rhyolitic lava flows and pyroclastic deposits blanket much of Yellowstone |  | | Report (issue) | | Mt. Elgon. A branch of the Kavirondo Gulf rift valley runs through the northern part of the area, and...(iii) Kiangata Agglomerate (iv) The Upper Kisingiri Lava Series (v) Minor Intrusions of Kisingiri (3) The...PLATES 1—Pillow structure in Nyanzian andesitic lava 2—Kavirondian conglomerate, one mile west of Rapogi...Ruri hills from the south-east Fig. 2—The Lambwe valley looking west from South Ruri, showing the Kaniamwia...pyrochlore from Rangwa XIII—Photomicrograph of melilitite lava from White Rock Point I Fig. Fig. II Fig. Fig. III |  | | Journal (article/letter/editorial) | | Marseille (France) ’ Laboraroire Associi au C.N.R.S. No. 266, U.S.T.L. 34060 Montpellier (France) ’ G.I.S...Universitb de Bretagne Occidentale, 29283 Brest (France) ’ Institute oj Geology, Academy of Geological...Formation) [16], made up of andesites and abundant rhyolitic ignimbrites. This volcanism (Late Cretaceous to...andesites (flows, tuffs, volcanic breccias) and dacitic to rhyolitic ignimbrites (ash and pumice flows), the...eastern border of this rift, the andesites and rhyolitic ignimbrites are associated with phonolitic tephrites |  | | Report (issue) | | Gunnery Range lie north and east of the Las Vegas Valley-Walker Lane shear zone, near the thickest part...rotated to northeasterly strikes near the Las Vegas Valley shear zone. Alluvium-filled basins comprise about...to be satellitic to the right-lateral Las Vegas Valley shear zone. The western and central parts are characterized...principal volcanic rocks are ash-flow tuffs of rhyolitic and quartz-latitic composition. Several of these...may possibly overlap, the Walker Lane-Las Vegas Valley shear zone, a transcurrent fault system along 4° |  | Cucciniello, C., Tucker, R. D., Jourdan, F., Melluso, L., Morra, V. (2016) The age and petrogenesis of alkaline magmatism in the Ampasindava Peninsula and Nosy Be archipelago, northern Madagascar. Mineralogy and Petrology, 110 (2) 309-331 doi:10.1007/s00710-015-0387-1 | Journal (article/letter/editorial) | | series of circular and elliptical intrusions, lava flows, dyke swarms and plugs of Cenozoic age emplaced...Be archipelago, whereas the volcanic rocks (as lava flows and pyroclastic rocks) are widely distributed...nepheline syenite and alkali granite, together with lava flows, dykes and plugs compositionally equivalent (Fig...Sakatia (close to Nosy Be) is covered by rhyolitic lava flows and cross-cut by basanite scoria cones and...titanite, alkali feldspar, magnetite, mica and analcime. Syenites (M200, RT-05NB-22-23C1-23C2, Nosy Be; |  | | Book | | l)asalt� ancl l1aw�t11te� an(l r;_;omc more ac1cl lava:-:, Volca111c t'ormatton K1nr1csswood Format1or1...districts BOOKS British Regional Geology The Midland Valley of Scotland, 3rd Edition, 1985 Memoirs The geology...Devonian and early Carboniferous rocks in the Midland Valley of Scotland. Vol. 18, No. 3, 1986 MAPS 1:625 000...of Carboniferous and Permian age in the Midland Valley of Scotland 2 1 6 Divisions of the Clyde Plateau...Renfrewshire Hills 23 7 Divisions of the Beith - Barrhead lava succession 26 8 Relations of the late Devensian |  | | Book (volume) | | plateau hasy well hatiyah, hatlyat depression, oasis, valley cave, depression, sinkhole hawa son of ibn family...kablr cliff, mountain, peak, ridge, spur kaf wadi, valley karkur carob tree kharrubah, kharrubat khurmah...flat-topped hill(s) qararah, qararat, depression, valley, wadi qarar qararat depressions, valleys, wadis...traditional farms beach,shore shati’ shatib wadi, valley beach, shore shatt market suq tadrart mountain...acid-volcanic pebbles. Accord¬ ing to Vincent (1970), “rhyolitic volcanic rocks are present only in the interior |  | | Report (volume) | | Virginia-503 National Center, Rm. 1C402, 12201 Sunrise Valley Dr. SALT LAKE CITY, Utah-Federal Bldg., Rm. 8105...mostly of welded to nonwelded rhyolitic ash-flow tuffs and mafic to felsic flows. 117°45' \ \ \ FIFTEEN...(Tertiary) Basaltic andesite, andesite, and rhyolite flows (Tertiary) Contact Dashed where approximately located...Alluvium (Quaternary) Tuff of Long Ridge (Tertiary) Rhyolitic plugs and dikes (Tertiary) Tuff of Trout Creek...andesite, and rhyolite flows (Tertiary) Tuff of Oregon Canyon (Tertiary) Basalt flows (Tertiary) Description |  | | Book | | EVOLUTION OF THE SOUTHERN PART OF THE KENYA RIFT VALLEY B.H. Baker, R. Crossley and G.G. Goles SOME ASPECTS...MOJE ACTIVE VOLCANIC AREA (ARUSSI: ETHIOPIAN RIFT VALLEY) H. Bizouard and G.M. Di Paola 87 THE VOLCANOLOGICAL... CONTENTS vii ORIGIN OF THE MAGMAS OF THE VESTFOLD LAVA PLATEAU C. Oftedahl 193 PETROLOGY OF THE SKIEN...Mueller THE ORIGIN AND EVOLUTION OF RIFTS AND RIFT VALLEY STRUCTURES: A MECHANISTIC INTERPRETATION S. Battacharji...and H. Koide EXPERIMENTAL MODEL STUDIES OF RIFT VALLEY SYSTEMS H. Ramberg RATES OF SEDIMENTATION AND VERTICAL |  | Stephenson, D., Bevins, R. E., Millward, D., Highton, A. J., Parsons, I., Stone, P., Wadsworth, W. J. (1999) Chapter 6: Wales and adjacent areas. In Caledonian Igneous Rocks of Great Britain (Geological Conservation Review Series - Geological Conservation Review No. 17. Joint Nature Conservation Committee, Peterborough. p.231-344. | Book (chapter) | | incursions of coarser sediment, transported by gravity flows. At the margins of the Welsh Basin shallower water...types through lowK tholeiites to calc-alkaline, some lava sequences showing more than one chemical type (Bevins...hawaiites and mugearites, as well as peralkaline rhyolitic rocks (Thorpe et al., 1989). These lavas still...1800 m of basaltic lavas and relatively minor rhyolitic lavas and ash-flow tuffs, which make up the Fishguard...and at the top of the pile an autobrecciated rhyolitic flow forming the Alit Felin Fawr Member. Of major |  | | Book | | granite plutons Siluro-Devonian Gaspeé-Connecticut Valley Synclinorium and Lake Memphremagog/Sargent Bay...those in Nevada and Arkansas in the USA; Chaillac, France; and Andhra Pradesh, India. Because of apparently...Tennessee; Deming, New Mexico; Missoula, Montana; Sun Valley, Idaho; and Petersburgh, southeastern Alaska. ...oilwell drilling. France About 60% of the 200,000 tons/year of barite production in France is derived from...fluorite, lead, and zinc miner- alization in France and several other European countries are described |  | | Report (issue) | | Milford is in the background. Editors’ note: The valley immediately west of the Mineral Mountains, containing...Beaver Bottoms (northern part). The name Milford Valley is not a formal geographic name recognized by the...portion of the injection well and being heated as it flows through the fracture network to the production well...consisting of high-standing domes and drainage-filling flows, occurs across the central Mineral Mountains. The...the eruption of several small basaltic cones and flows along the northeastern flank of the Mineral Mountains |  | | Report (volume) | | section: Measured section W of Lime Kiln in Frederick Valley, Frederick County. Named for town of Adamstown...Guidebook III, p. 238 4. Andesite and latite 1. Flows and flow breccia 9. Overlies Tadpole Ridge Quartz...Branch, Swain County. Named for Ammons Branch, which flows into Little Tennessee River W of Southern Railroad...basalt 5. Gray 6. < 15 m 9. Oldest of 12 named flows of Portage Lake Volcanics on Isle Royale; erupted...Sandstone, siltstone, and shale interlayered with mafic flows and sills 6. 850 m 9. Overlies Finger Bay Volcanics; |  | | Book (edition) | | authigenic orthoclase, pyrite; quartz, dolomite, and analcime. SELECTED REFERENCE: Milton, C., et al., Am. Min...Greece. Other occurrences are found in Chile, Italy, France, Germany, Turkey, and Algeria. SELECTED REFERENCES:...AEGIRINE (Acmite) NaFe*°Si,0, Pyroxene Group Var. Blanfordite CRYSTAL SYSTEM: CLASS: 2/m SPACE GROUP:...‘‘gummite’’ at Margnac, in the Massif Central, France. SELECTED REFERENCE: Cesbron, F., et al., Min....Mexico; in New Zealand at Camoola Reef, Maratoto Valley, and the Hauraki gold field; Washington County |  | | Report (issue) | | trans-Alaska pipeline system TVA -----------Tennessee Valley Authority U.N. ------------------------United Nations...mantle plumes in the interior of plates (Mississippi Valley and other types), or (4) in regions of continental...southwestern New Mexico Several extensive areas of rhyolitic tuff in the Winston, N.Mex., area were mapped...Helena marked by thin-bedded to massive white rhyolitic and the upper part of the Wallace Formation conwater-laid...intrusive rocks were established: (1) volcanic flows and ash-flow tuffs at 38 to 39 m.y., (2) ash-flow |  | | Report (volume) | | phase is mainly represented by mafic and felsic flows while granites occurring as plutons, ring dykes... 100 Crystal anatexis for the production of rhyolitic melt Magma genesis . 100 ...... ............commenced with the eruption of basic flows, followed by voluminous acid flows, which culminated with ash flow...activity are mostly basalt with occasional andesite flows. These are subsequently covered by the voluminous...peraluminous rhyolite, rhyodacite and trachyte flows during the second stage. The third stage ceased | | | Book (edition) | | Greece. Other occurrences are found in Chile, Italy, France, Germany, Turkey, and Algeria. SELECTED REFERENCES:...triclinic AEGIRINE (Acmite) NaFe+3 Sb06 Pyroxene Group Var. Blanfordite CRYSTAL SYSTEM: Monoclinic CLASS: 2/m...in "gummite" at Margnac, in the Massif Central, France. SELECTED REFERENCE: Cesbron, F., et al., Min....Mexico; in New Zealand at Camoola Reef, Maratoto Valley, and the Hauraki gold field; Washington County...counties, Arizona; and at deposits in Mexico, Canada, France, Bulgaria, Czechoslovakia, and elsewhere. SELECTED |  | | Journal (volume) | | originally to have extruded as plagioclase-porthyritic lava flows. Next, first diabase, then rapakivi porphyries...emplacement of the diabase, whether extruded as lava flows, as assumed by Hackman, or intruded as subvolcanic...connection with the typical plagioclase porphyrite. A lava character is dominant there. In the Ruoholampi roof...rock might weIl have been produced by extrusive lava. Tension dikes occur in the southern part of the...biotite, chlorite, sphene, opaque minerals and analcime. The texture is granoblastic. The occurrence of |  | | Report (issue) | | B.P.; Pierce and others, 1976), and (3) rhyolitic lava flows and pyroclastic rocks of middle and late...E., 1983, Selective concentration of cesium in analcime during hydrothermal alteration, Yellowstone National...Bargar, K.E., 1974, Hydrothermal alteration of rhyolitic ash-flow tuff in the vapor-dominated geothermal |  | | Book | | lies 310 km northeast of the lake. There are other flows nearer to Lake Urmia in Iran (Moorey 1999; Wright...stone in the mountains north and west of the Soghun Valley in the southern Zagros Mountains. This research...obtained from the radiolarian chert- OIB-type pillow lava associations within the accretionary mélange is...zones. The radiolarian ages obtained from pillow-lava – chert assemblages range between Middle Triassic...Extensional Provence, CAP Central Anatolian Provence, EACP East Anatolian Compressional Provence, NAP North |
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Rhyolitic lava flows, Reyran valley, Fréjus, Draguignan, Var, Provence-Alpes-Côte d'Azur, France