 | | Journal (article/letter/editorial) | | corresponding variation from slightly nepheline to hypersthene normative compositions. Consequently, alkalic...normative augites; tholeiitic liquids coexist with hypersthene normative augites; and transitional liquids coexist...samples: GR2 - Snaefellsnes (Thy 1983) KRAI Krafla volcano (K Gr6nvold, pers comm) HS605 Langj6kull (Sigurdsson...and diopside (Fig. 5) and to be located to the hypersthene side of the normative divide. In contrast to...slightly hypersthene normative and are significantly less calcic. Tholeiitic liquids (Krafla, Table 1; |  | | Report (chapter) | | Society, London, Special Publications Basaltic-volcano systems George P. L. Walker Geological Society...lyellcollection.org/ by guest on March 31, 2014 Basaltic-volcano systems GEORGE P. L. W A L K E R Hawaii Center...stratovolcanoes, flood-basalt fields, monogenetic-volcano fields, and central volcanoes (having silicic volcanics...WALKER Fig. 1. Volcano types and volcano systems. (a) The five types of basaltic-volcano systems, illustrated...coast. (e) Sketch map of the Auckland monogenetic-volcano field, New Zealand, simplified by omitting the |  | | Journal (article/letter/editorial) | | ratios that fall in the MORB field (e.g., Krafla Volcano, Iceland), and these localities also tend to have...Galapagos Islands (White et al., 1993), Krafla volcano, Iceland (Nicholson and Latin, 1992); and volcanic...in the Pacific Ocean basin as well as Krafla Volcano of Iceland in the Atlantic Ocean basin. The Galapagos...are in the postshield, subaerial cone-building volcano sequence that contains alkali basalts and phenocryst-rich...omitted. B. Analyses of individual samples by volcano and rock type. The dashed line is the trend of |  | Dostal, Jaroslav, Hamilton, Tark S., Shellnutt, J. Gregory (2017) Generation of felsic rocks of bimodal volcanic suites from thinned and rifted continental margins: Geochemical and Nd, Sr, Pb-isotopic evidence from Haida Gwaii, British Columbia, Canada. Lithos, 292. 146-160 doi:10.1016/j.lithos.2017.09.005 | Journal (article/letter/editorial) | | often mineralized with finely disseminated pyrite. Volcano-marine equivalents include the felsic breccias...rhyolites (Appendix 1). Orthopyroxene ranges from hypersthene to 9 ACCEPTED MANUSCRIPT ferrohypersthene...results indicate a relatively uniform juvenile source region for Mesozoic and younger igneous rocks of the Wrangellia...allochthonous terrane including its mantle AC CE P source region is predominantly an isotopically juvenile oceanic...geothermal well while drilling at the Krafla volcano, Iceland. Geology 39, 231-234. 32 ACCEPTED MANUSCRIPT |  | | Report (volume) | | Large Quaternary Calderas: Details of Unrest 81 Region 1: Mediterranean 82 Italy Vulsini (Latera/Conca...Vecchia 124 Greece Santorini (Thira) 129 Nisyros 135 Region 2: Africa 138 Ethiopia Fantale 139 K'one (Gariboldi)...Deriba 152 Region 3: Indian Ocean 156 Reunion Island Piton de la Fournaise 157 Contents VII Region 4: New...Taupo 174 Rotorua 186 Tonga Tofua 190 Niuafo'ou 193 Region 5: Melanesia 197 Papua New Guinea St. Andrew Strait...New Hebrides Gaua Island 245 Aoba 248 Ambrym 251 Region 6: Indonesia 255 Toba 256 Maninjau 267 Ranau 276 |  | | Journal (article/letter/editorial) | | et al., 1988 Oversby, 1972 Indian Ocean Basin Krafla Vol. Surtsey Widom et al., 1992 Oskarsson et al...Verde F. Noronhodi Tristan da Cunha Azores Is. Iceland Dickey et al., 1977 H u m p h r i s et al., 1985...depleted-MORBmantle basalts of Iceland, like rocks from the Krafla volcano averaging 11.7 ppm Ce, are in...trations than those for MORB (Fig. 3B). Mauna Kea volcano on the island of Hawaii, the Pitcairn Islands,...Honolulu series on the island of Oahu and the Koloa volcano series on the island of Kauai, have more scattered |  | | Book | | Guttard studied the rocks of the Auvergne region of central France and recognized many recently...derived from vol- cani vicus, or the seat of a volcano. Desmarest (1771) also worked in the Auvergne and...growth in our knowledge of magmatic rocks of Iceland could be expressed in Hall used a primitive furnace...Sartorius von Waltershausen (1853) also worked in Iceland and he proposed that the different igneous rocks...work (1894-1933) on the igneous rocks of the Oslo region of Norway; (b) the publication in 1895 of Alfred |  | | Book | | Neogene flood basalts, Reyðarfjörður, Eastern Iceland. Photo © Hervé Bertrand Printed on acid-free paper...Ollier (Australia), and Thorvaldur Thordarson (Iceland). Their constructively critical reviews helped...Bibhas Sen Geological Survey of India, North Eastern Region, Shillong, Meghalaya, India e-mail: bibhas.sen@gmail...Faculty of Earth Sciences, University of Iceland, Reykjavík, Iceland e-mail: torvth@hi.is Loÿc Vanderkluysen... East Greenland, Emeishan, Ethiopian, Ferrar, Iceland, Karoo, Paraná, Siberian, and West Greenland) are |  | | Report (volume) | | Ethiopia~Yemen flood basalt pro- vince) (Fig. 1). Thus, the region records both the evolution of Earth’s youngest...Pre-rift flood basalts and Quaternary lavas in a large region surrounding the volcanically active Afar province...basin development in the 236, 409-438. Turkana region. Tectonophysics, the American Geophysical Union...Hest, H. & Woopuouse, J. 1999, beneath Africa and Iceland. Science, 286, 1925— 1928. Ritter, J.R.R. & Kaspar...additional CMT The from Jackson of each epicentral region. We ae a a2 8 ages g 35 5 the Harvard Centroid |  | | Book (edition) | | Typhon is buried under Etna volcano. Whenever the giant stirs, the volcano erupts violently. Eighteenth...Science, New Zealand Stephen R. McNutt Alaska Volcano Observatory and University of Alaska Fairbanks...Hazard from Lahars and Jökulhlaups Synthesis of Volcano Monitoring 973 1121 John B. Murray, Hazel Rymer...McNutt Impacts of Eruptions on Human Health Volcano Warnings Volcanic Crises Management Peter J. Baxter...Related Phreatomagmatic Eruptions Synthesis of Volcano Monitoring 495 1165 Volcanic Lakes Volcanic Materials |  | | Report (issue) | | rocks Precambrian rocks Tectonics Basin and Range region _______ _______________ Stratigraphic and structural...Igneous rocks Geochronologic studies Pacific coast region Oregon Western United States Washington California...Geologic maps Water-resource investigations Northeastern region Connecticut Delaware Illinois Indiana Maryland...Water-resource investigations Continued Northeastern region Continued Virginia ________________________...___ Wisconsin ________________ Southeastern region ___________ Alabama _______________________ Florida |  | | Report (volume) | | rocks Precambrian rocks Tectonics Basin and Range region _______ _______________ Stratigraphic and structural...Igneous rocks Geochronologic studies Pacific coast region Oregon Western United States Washington California...Geologic maps Water-resource investigations Northeastern region Connecticut Delaware Illinois Indiana Maryland...Water-resource investigations Continued Northeastern region Continued Virginia ________________________...___ Wisconsin ________________ Southeastern region ___________ Alabama _______________________ Florida |  | | Book | | which is softer. THIS OBSIDIAN outcrop is in Iceland, an island where acid igneous rocks are rare. ...Trachyte outcrops of trachyte are seen in this volcano on the island of Tenerife. DOME-SHAPED feldspar...margins. and pyroclastic dacite forms much of the volcano at Crater Lake, Oregon, USA. EXTRUSIVE hornblende...country rocks, which surround and lie beneath the volcano. Rounding of the clasts may have occurred in the...which plugs the main or a satellite vent of a volcano. The outcrop of this rock is circular on a geological |  | | Book | | environments from ophiolites, contemporary oceanic crust, Iceland, continental rifts, and continental margins. Professor...open your eyes to the largest and most unexplored region on Earth – the global Mid-Ocean Ridge. My own introduction...ridges: fire and ice 4.2.1 Grimsey Field, north of Iceland 4.2.2 Trollveggen (Troll Wall) Field, Mohns Ridge...colonization 4.11.5 Wiring an active submarine volcano 4.12 Guaymas Basin: venting at sedimented ridges...historically difficult to image. In places such as Iceland, however, where volcanism has been ongoing for |  | | Book (edition) | | hidden by a nebular disc of material (diagonal dark region) similar in mass and size to the one that formed...lower side by the 660 km seismic discontinuity. The region between this depth and another prominent discontinuity...capable of moving, albeit very slowly. In this region, heat can be transferred by moving hot low-density...triple junction may be present beneath the Afar region of Ethiopia, with the Red Sea and Gulf of Aden...calcite, also CaCO3 – after a locality in the Aragon region of Spain); after some major chemical constituent |  | | Book (edition) | | hidden by a nebular disc of material (diagonal dark region) similar in mass and size to the one that formed...lower side by the 660 km seismic discontinuity. The region between this depth and another prominent discontinuity...capable of moving, albeit very slowly. In this region, heat can be transferred by moving hot low-density...triple junction may be present beneath the Afar region of Ethiopia, with the Red Sea and Gulf of Aden...calcite, also CaCO3 – after a locality in the Aragon region of Spain); after some major chemical constituent |  | | Book (edition) | | historic eruptions 251 and natural gas 130 13.11 Volcano prediction 257 9.10 Exploration for oil and...ask: What are the lavas made of? How does the volcano work and how is the heat generated? Where do the...the lavas and gases come from? When did the volcano first begin to erupt and when is it likely to erupt...It is quite useless, for example, to ask why a volcano erupts, or why the sky is blue, or why there are...propitiated by suitable sacrifices. In the Mediterranean region, for example, many of the Olympian gods made familiar |  | | Report (issue) | | and drainage systems of the Big Lost Trough, northeastern Snake River Plain, Idaho. 11 Jeffrey K. Geslin...issues can be addressed while scientists across the region benefit from pursuing the science needs of the...sedimentary facies and Pleistocene stratigraphy of the northeastern Idaho level fluctuations, and water movement...surficial sediments near Test Area North (TAN), northeastern Snake River Plain: An actualistic guide to aquifer...Professional Paper 725-B, 49 p. resources of the Mud Lake region, Idaho, including the Island Park area: U.S. Geological |  | | Book (volume) | | is less, the viscous-dominated Stokes’ settling region also persists up to 100 mm. However, the fast falling...environment of the estuarine turbidity maximum above the region within a metre of the bed. Closer to the bed, high...sublayer, there is a transition (‘buffer layer’) to a region in which the flow speed varies as the logarithm...it is not suspended. This means that there is a region of bedload transport for all particles of settling...Suspension Once material is moved out of the near-bed region, it is held in suspension by the action of fluid |
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