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Oseanitt, oceanitt, olivinbasalt, lavabergart med høyt innhold av olivin (2040 %). Kjent fra stillehavsøyene og i mindre mengder fra Island og Færøyene. Store norske leksikon. Hentet fra http://snl.no/oseanitt Fine-grained extrusive igneous rock, a basalt that contains plagioclase feldspar (labradorite), clinopyroxene (augite with pigeonite or hypersthene), and iron ore (magnetite and ilmenite). Tholeiitic lavas often contain glass, but little or no olivine. Tholeiite occurs as extensive plateaus (volumes on the order of 200,000 to 800,000 cubic km [50,000 to 200,000 cubic miles]) in the Pacific Northwest (Encyclopædia Britannica) Picrite basalt, picrobasalt or oceanite is a variety of high-magnesium olivine basalt that is very rich in the mineral olivine. It is dark with yellow-green olivine phenocrysts (20 to 50%) and black to dark brown pyroxene, mostly augite. http://en.wikipedia.org/wiki/Picrite_basalt |
Picrite basalt or oceanite from the Piton de la Fournaise Copyright © 2005 David Monniaux http://en.wikipedia.org/wiki/File:Oceanite_grand_brule_dsc03601.jpg |
ANIMALS over 250 |
BIRDS over 500 |
FLOWERS over 225 |