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Oxide | Analysis | Formula | |
---|---|---|---|
CaO | 7.90% | 0.32 | |
K2O | 0.60% | 0.01 | |
MgO | 10.30% | 0.58 | |
Na2O | 2.40% | 0.09 | |
TiO2 | 1.60% | 0.05 | |
Al2O3 | 14.10% | 0.31 | |
P2O5 | 0.30% | - | |
SiO2 | 48.60% | 1.82 | |
Fe2O3 | 11.20% | 0.16 | |
MnO | 0.10% | - | |
LOI | 3.80% | n/a | |
Oxide Weight | 218.89 | ||
Formula Weight | 227.54 |
Volcanic rock essentially of plagioclase, labradorite, magnetite, and pyroxene, with olivine, biotite, and hornblende. Formed by magma emission. There are two distinct basalts: feldspathic and alkaline, both plagioclase feldspathics but the latter containing significantly more sodium and potassium.
Basalt
Peridot In Basalt
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