few larger larger Calcite CaCO3 ones up to rounded Olivine (Mg,Fe)2SiO4 2.0 mm ones 15 Red with 2.5 3 6 Dark red Abundant 0.1 0.5 Very Mostly Quartz SiO2 – black edge YR mm poor angular Olivine (Mg,Fe)2SiO4 on one side (main) and sub Plagioclase NaAlSi3O8 – angular CaAl2Si2O8 Sanidine (K,Na)AlSi3O8 2.5 1 Reddish 2.5 black Unknown red YR mineral (edge) 16 Pale yellow 2.5 Y 6 6 Olive Abundant 0.2 0.5 Fair Mostly sub Olivine (Mg,Fe)2SiO4 – yellow mm rounded (Mg,Fe)SiO3
few larger ones up to 2.0 mm larger rounded ones Calcite CaCO3 Olivine (Mg,Fe)2SiO4 15 Red with black edge on one side 2.5 YR (main) 2.5 YR (edge) 3 2.5 6 1 Dark red Reddish black Abundant 0.1 – 0.5 mm Very poor Mostly angular and sub angular Quartz SiO2 Olivine (Mg,Fe)2SiO4 Plagioclase NaAlSi3O8 – CaAl2Si2O8 Sanidine (K,Na)AlSi3O8 Unknown red mineral 16 Pale yellow 2.5 Y 6 6 Olive yellow Abundant 0.2 – 0.5 mm Fair Mostly sub rounded Olivine (Mg,Fe)2SiO4 (Mg,Fe)SiO3
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