feldspar
The quality of being semicircular.
(mineralogy) Any of a large group of rock-forming minerals that, together, make up about 60% of the earth's outer crust. The feldspars are all aluminum silicates of the alkali metals sodium, potassium, calcium and barium. Feldspars are the principal constituents of igneous and plutonic rocks.
A surname.
plural of Hayward
地質学者は、試料を手に取って長石と石英を同定し、その岩石の成因を記述した。
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