Geology · Mineralogy and Petrology
Feldspar minerals, which constitute a major portion of the Earth's crust, are primarily formed by:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Crystallization from silicate magma or igneous melts✓
- 2Direct condensation of vapors from volcanic emanations
- 3Evaporation and precipitation from surface water bodies
- 4Biogenic deposition in marine basins
Correct answer
Crystallization from silicate magma or igneous melts
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