feldspar

/feld-spahr, fel-/US // ˈfɛldˌspɑr, ˈfɛl- //UK // (ˈfɛldˌspɑː, ˈfɛlˌspɑː) //

长石,長石,矩形石,矩形石料

Definitions

n.名词 noun

1
- : any of a group of minerals, principally aluminosilicates of potassium, sodium, and calcium, characterized by two cleavages at nearly right angles: one of the most important constituents of igneous rocks.

Sienite and feldspar succeeded in our descent to the snow line, where we found a felspathic granite.
The feldspar exhibited its splendent black crystals in fine relief in the massy quartz.
What little feldspar there was is reduced to quartz and mica, and the quartz pebbles are drawn out into lenses.
This was materially assisted by the weak lath shapes of the feldspar and the mobility of the micas.
The appearance of the rock is not modified by the amount of feldspar which it contains.