- ALASKA VOLCANO OBSERVATORY GLOSSARY
Igneous rocks in which the molecular proportion of aluminum oxide is less than that of sodium and potassium oxides combined.
Glossary of volcanic terms. - University of Wisconsin Oshkosh. G. J. Hudak. 2001.
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peralkaline — adjective Describing igneous rocks that have a higher ratio of sodium and potassium to aluminium than is needed to produce feldspar … Wiktionary
peralkaline — per·alkaline … English syllables
peralkaline — |pər., (ˈ)per+ adjective Etymology: per + alkaline : having a molecular proportion of alumina less than that of soda and potash combined used of an igneous rock … Useful english dictionary
Anahim hotspot — The Anahim hotspot is a volcanic hotspot in central British Columbia, Canada. It is situated on the Interior Plateau, a large region that lies between the Cariboo and Monashee Mountains to the east, and the Hazelton Mountains, Coast Mountains and … Wikipedia
Baltic Shield — The Baltic Shield (sometimes referred to as the Fennoscandian Shield) is located in Fennoscandia (Norway, Sweden and Finland), northwest Russia and under the Baltic Sea. The Baltic Shield is defined as the exposed Precambrian northwest segment of … Wikipedia
Nepheline syenite — of the Intrusive Complex of Tanguá, State of Rio de Janeiro, Brasil (Motoki et al., 2011a) Nephelene syenite is a holocrystalline plutonic rock that consists largely of nepheline and alkali feldspar. The rocks are mostly pale colored, grey or… … Wikipedia
Pantelleria — Comune Comune di Pantelleria Panorama … Wikipedia
Carbonatite — Carbonatites (pronEng|kɑrˈbɒnətaɪt) are intrusive or extrusive igneous rocks defined by mineralogy that comprises more than 50 volume % carbonate minerals. Carbonatites may be confused with marble, and may require geochemical… … Wikipedia
Yellowstone hotspot — Schematic of the hotspot and the Yellowstone Caldera Location of the hotspot in … Wikipedia
Northern Cordilleran Volcanic Province — NCVP … Wikipedia