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The mineralogy of basalt is characterized by a preponderance of calcic plagioclase feldspar and pyroxene. Olivine can also be a significant constituent.

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13y ago

Basalt varies in mineral composition. Plagioclase feldspar, pyroxene, olivine, magnetite, and ilmenite are common minerals present in basalt.

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9y ago

Basalt is made up of three minerals. Basalt is consist (by volume) of quartz (less that 20 percent), feldspathoid (less than 10 percent), and plagioclase (65 percent the least).

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6y ago

Pyroxene and calcium-rich plagioclase are the most abundant minerals. Some basalt contains olivine.

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9y ago

Basalt is mainly comprised of calcic plagioclase feldspar and pyroxene. Olivine can also occur in large amounts in basalt and a number of other minerals may appear in minor amounts.

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11y ago

Basalt is fine-grained so that the individual minerals are not visible, but they include pyroxene, plagioclase feldspar and olivine.

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12y ago

iron oxides, iron-titanium oxides, magnetite, ulvospinel and ilmenite

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11y ago

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11y ago

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Q: What is the chemical composition of a basalt?
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What is the chemical composition of basalt?

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