21000-27 - NWA Possible Achondrite Meteorite Basaltic Composition. In study. 29 g Onchopristis teeth collections clinopyroxene

clinopyroxene

one of a number of cupric sulfates

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Korn and Klug 2002 and Sepkoski 2002

Nolichuckia

21000-27 - NWA Possible Achondrite Meteorite Basaltic Composition. In study. 29 g Onchopristis teeth collections clinopyroxenePetrographic description Under petrographic microscope, the sample is a fine grained volcanic rock with olivine and pyroxene phenocrysts, surrounded by a fine grained matrix (Figs. 2 and 3). Phenocrysts show deformation, developing twins and cracks. Olivine grains have a thin rim (Figs. 2 and 3) of iddingsite (reddish border). Pyroxene is pale brown and presents some plagioclase inclusions. The matrix is formed by tabular euhedral plagioclase and