Augite
91granodiorite — Medium to coarse grained rock that is one of the most abundant intrusive rocks. It contains quartz and is distinguished from granite by having more plagioclase feldspar than orthoclase feldspar; its other mineral constituents include hornblende,… …
92latite — or trachyandesite Type of igneous rock that is abundant in western North America. Usually white, yellowish, pinkish, or gray, it is the volcanic equivalent of monzonite. Latites contain plagioclase feldspar (andesine or oligoclase) as large,… …
93leucitite — ▪ rock extrusive igneous rock, coloured ash gray to nearly black, that contains leucite and augite as large, single crystals (phenocrysts) in a fine grained matrix (groundmass) of leucite, augite, sanidine, apatite, titanite, magnetite, and …
94limburgite — ▪ rock dark coloured volcanic rock that resembles basalt but normally contains no feldspar. It is associated principally with nepheline basalts and leucite basalts; it also occurs with monchiquite, from which it is not easily distinguished …
95spilite — ▪ rock fine grained or dense, extrusive igneous (volcanic) rock that is usually free of visible crystals and is commonly greenish or grayish green in colour. Spilites are of basaltic character but contain the feldspar albite in place of the …
96Silicate minerals — ▪ Table Silicate minerals name colour lustre Mohs hardness specific gravity Tectosilicates (three dimensional networks) feldspar (for other examples, see feldspar) orthoclase flesh red, white to pale yellow, red, green vitreous 6–6½ 2.6… …
97Pyroxenes — ▪ Table Pyroxenes name colour lustre Mohs hardness specific gravity aegirine green to greenish black vitreous 6 3.4–3.6 augite brown; green; black vitreous 5 1/2–6 3.2–3.5 diopside white, pale to dark green (diopside); brownish green, dark green …
98Clinopyroxene thermobarometry — Compositional diagram of pyroxenes. Diopside, hedenbergite and augite are main sub minerals of clinopyroxene. Jadeite contains aluminium and is therefore not shown in the diagram. In petrology the mineral clinopyroxene is used for temperature and …
99Géologie de la planète Mars — La géologie de la planète Mars, parfois appelée aréologie[1], recouvre l étude scientifique de Mars et de ses propriétés physiques, de ses reliefs, de sa composition, de son histoire, et de tous les phénomènes qui ont affecté ou affectent encore… …
100Puys Chopine et des Gouttes — Le puy Chopine (à droite) dépassant du puy des Gouttes (au centre). Géographie Altitude 1 181 m …
