 | | Journal (article/letter/editorial) | | thick. Each of the major eruptions began with a pumice-fall phase, and most culminated with emplacement...vented large volumes of dacitic or rhyodacitic pumice, and may account for 90% or more of all silicic...and 2) where hornblendebearing rhyodacitic lavas, pumice-fall deposits, and water-lain vitric tuffs and...encompass the estimated vent positions for some of the pumice-fall deposits of the Thera Pyroclastic Formation...chemical and petrographic uniformity of the dominant pumice type and the absence of internal soil horizons |  | | Journal (article/letter/editorial) | | of the Laacher See magma chamber (Eifel, West Germany) G. WOrner 1.2, H. Staudigel ~,3 and A. Zindler...the Quaternary East Eifel volcanic field (West Germany) represents an inverted, chemically zoned magma...freshly cut, nearly continuous exposures in pumice quarries, within a few kilometers south of the Laacher...Seven representative whole rock samples (i.e. bulk pumice clasts), four matrix separates, and fifteen mineral...and removed during handpicking of crushed bulk pumice samples. Thin section observations show such small |  | | Report (issue) | | ........................................... 58 Pumice and scoria ......................................Pennsylvanian and Cretaceous shales and building blocks of pumice and scoria from Quaternary volcanoes. A cement...wallboard, plaster, pumice, block, brick, and tile made from local limestone, gypsum, pumice, scoria, and clay...gold-silver mines of the Cochiti district, pumice is quarried for use in pumice blocks. Its cumulative value now...gold and silver. Santa Fe County has its own pumice quarries west of Espanola. Almost within sight of the |  | | Journal (issue) | | Head nort heast on un· paved roads 10 a bandoned pumice quarry on north side or old Brooks..scanlon road...BEND AIR·FALL PUMICE This abandoned quarry exposes a 7·m·thick section of Bend Pumice of Taylor ( 198...well-developed basal layer that contains coarse pumice clasts. Lava Island Tuff of Taylor ( 1981) liC5...ight ahead (north) on 14th NW St. Figure J. Btnd Pumice ol-eriain by Tumalo Tuff al SlOP 8. OREGON GEOLOGY...up the gulch. Reworked pumice lapilli, ash, and obsidian of basal Bend Pumice are well exposed along |  | | Report (chapter) | | strat. range lithostratigraphic units frr2 frr1 pumice cone and coulee Eruptive Epoch 9 (northeastern...Obsidian-rich pumiceous pyroclastic-breccias. Rhyolites. pumice Epoch 9c cone volcanic quiescence M. Pilato sa...of obsidianaceous lava flows (sa1). Rhyolites. pumice cone and coulee Forgia Vecchia fv2 Forgia Vecchia...77-56 (cordierite-rich lavas) 76-56 augite diopside-augite Orthopyroxene bronzite-hyperstene An...(rhyolites) An30-18 diopside-augite augite (mafic enclaves) augite (cordierite-rich lavas) enstatite |  | | Report (issue) | | Readout on right exposes a thin layer of 2-ka pumice lapilli from the Rock Mesa vent on South Sister...coarser grained than the lower unit; individual pumice bombs are as large as 20-30 cm. Lithic fragments...19), which is the source of much of the scattered pumice on the ground surface seen at earlier Day-2 stops...Carver Lake vents. (See notes below) Rock Mesa pumice and n-6 Si02 A120J Fe2O3§ FeOS MgO CaO Na 2 0...0 34 0 3 1 1 1 1 1 1 0 12 1 1 0 2 Devils Hill pumice lava n-6 n-13 72.5 14.7 0.70 1.47 0.62 1.99 4 |  | | Report (issue) | | flows.-__ Bishop tuff -__-_---_--------------Basal pumice layer _______________ Principal tuff member.___...inversely graded layers of pumice resulting from dumping two batches of pumice into a beaker partly full... blende gabbro contains hornblende rather than augite, the usual principal mafic mineral of gabbro. ALTERED...contain hornblende or uralitic amphibole rather than augite, and are therefore classed as hornblende gabbro...locally contains residual cores of augite, and some hornblende encloses augite or uralitic amphibole. Many of |  | | Book | | editors Corrado Cimarelli, München, Germany Sebastian Müller, Mainz, Germany More information about this...distinguished researchers from Greece, Switzerland, Germany, and Italy to provide a compilation of all different...ETH-Zurich, Switzerland) born 1940 in Berlin (Germany) with studies in: Technical University Berlin,...(Greece) as scientific coordinator. In Switzerland and Germany he joined geological hazard and risk related pilot...neighbouring island Yali are covered with voluminous pumice deposits, which are mined on a large scale. The | | | Book | | editors Corrado Cimarelli, München, Germany Sebastian Müller, Mainz, Germany More information about this...distinguished researchers from Greece, Switzerland, Germany, and Italy to provide a compilation of all different...ETH-Zurich, Switzerland) born 1940 in Berlin (Germany) with studies in: Technical University Berlin,...(Greece) as scientific coordinator. In Switzerland and Germany he joined geological hazard and risk related pilot...neighbouring island Yali are covered with voluminous pumice deposits, which are mined on a large scale. The |  | Sweetkind, Donald S., Rytuba, James J., Langenheim, Victoria E., Fleck, Robert J. (2011) Geology and geochemistry of volcanic centers within the eastern half of the Sonoma volcanic field, northern San Francisco Bay region, California. Geosphere, 7. 629-657 doi:10.1130/ges00625.1 | Journal (article/letter/editorial) | | comparison of phenocryst assemblage and mineralogy, pumice and lithic Santa Rosa " 6 kf sC e re R...obvious lithic inclusions, but individual fiamme or pumice were not sampled or analyzed. All whole-rock samples...glass from tephra layers, which include ash fall, pumice fall, ash flow, and water-reworked tuff deposits...single cooling unit com prised of both lithic- and pumice- (up to 30 cm) rich, nonwelded to partially welded... the presence in this vicinity of the coarsest pumice breccia and greatest abundance of lithic clasts |  | | Report (issue) | | rhyolite-f!rauite class. , . . olcanie gla<.:ses, pumice, aud perlite are in this class. The more basic...distriet Group IV Cascade Range and -:\lodoc PJ ateau Pumice and perlite deposits Freshwater clia to mite of...layer Lower Cedarville l\IJNERAL DEPOSIT Perlite Pumice 16 B t.,LLETIX 176-~lD-"ER.ll. ( 41 3-orther...rock Quickill'"er :--onoma ,·olca.nics Perlite, pumice. ,tone building - Quaternary ..,cream gravel...made from n1etals or mineral raw materials. Sand, pumice, and pumicite are the pri11cipal abrasives produced |  | | Book | | DIRECTOR See erweiwE POR |S —$<$_____ MINES AND QUARRIES IQO2 PREPARED UNDER THE SUPERVISION CHIEF...1.—Character of inquiries concerning mines and quarries: 1850 to 1902 ...........--..----------.--2-----Table...included in Census reports concerning mines and quarries: 1850 to 1902........--.---.-.--.---Maplers—=Mlininostatistics...aes Table 13.—Productive and unproductive mines, quarries, and wells: 1902.......-..---------------------+------Table...quantity and value of such materials obtained from quarries included under other GlASsiti Caton sal OO 2Re |  | | Book | | covered half the island with a thick layer of ash and pumice fragments, but luckily nobody was visiting the...located in the small and rather bleak island of Jan Mayen. Beerenberg has been active five times since 1633...The lucky birthday boy was Kaiser Wilhelm II of Germany, who received it from his generous grandmother...water as was discussed in our “tour,” from Jan Mayen at the north to Bouvet Island near Antarctica. Like... meaning flows of broken magma fragments, ash, pumice, and gas (in volcanological terms, a nuée ardente |  | | Book (volume) | | of the Geological Society of London. Porphyry; Pumice; Pyroxenite; Quartzite; Quartz-Porphyry. J. S...flowers. POMERANIA (German, Pommern), a territory of Germany and a maritime province of Prussia, bounded on...Oder. Pomerania is one of the flattest parts of Germany, although east of the Oder it is traversed by a...lampreys are s6nt from Pomerania to other parts of Germany. With the exception of the almost inexhaustible...to weaken the house of Austria by alliances in Germany; but Mme de Pompadour changed this hereditary policy |
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