Trioctahedral vermiculite in a 1980 pyroclastic flow, Mt. St. Helens, Washington

Trioctahedral vermiculite, previously unreported, is an abundant phyllosilicate in a Mt. St. Helens pyroclastic flow that was emplaced during the 18 May 1980 eruption. The response of this mineral to various treatments suggests its layer charge is approximately 0.6 per O/sub 10/(OH)/sub 2/. In the p...

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Veröffentlicht in:	Soil Sci.; (United States) 1987-03, Vol.143 (3), p.162-167
Hauptverfasser:	LaManna, J.M, Ugolini, F.C
Format:	Artikel
Sprache:	eng
Schlagworte:	580202 - Geophysics- Volcanology- (1980-1989) ACID RAIN ALKALINE EARTH METAL COMPOUNDS ALTERATION ATMOSPHERIQUE ALUMINIUM COMPOUNDS ALUMINIUM SILICATES AREAS VOLCANICAS ATMOSPHERIC PRECIPITATIONS CARACT MORFOLOGICAS (SUELOS) CASCADE MOUNTAINS CHEMICAL COMPOSITION CHEMISTRY DETRITUS FEDERAL REGION X GEOCHEMISTRY GEOSCIENCES INORGANIC ION EXCHANGERS ION EXCHANGE MATERIALS IRON COMPOUNDS IRON SILICATES LAVA MAGNESIUM COMPOUNDS MAGNESIUM SILICATES MATERIALS METEORIZACION MICA MINERALOGIA MINERALOGIE MINERALOGY MINERALS MOUNTAINS MT ST HELENS NATURAL OCCURRENCE NORTH AMERICA OXYGEN COMPOUNDS RAIN SILICATE MINERALS SILICATES SILICON COMPOUNDS SOIL MORPHOLOGICAL FEATURES SOILS SOL VOLCANIQUE SUELO VOLCANICO TEPHRA LAYERS TRAIT MORPHOLOGIQUE DU SOL TRANSITION ELEMENT COMPOUNDS USA VERMICULITA VERMICULITE VERMICULITES VOLCANIC AREAS VOLCANIC REGIONS VOLCANIC SOILS WASHINGTON WEATHERING ZONE VOLCANIQUE
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