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单词 red feldspar
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red feldspar
red feldspar n.
ΚΠ
1799 R. Townson Tracts & Observ. Nat. Hist. & Physiol. 209 Horizontal veins..of a whin, which, by the admixture of red feldspar, has a reddish appearance.
1894 Amer. Naturalist 28 163 A red feldspar with a little mica and no quartz, like the outcrop at Ute Pass, Colorado.
1940 F. F. Grout Kemp's Handbk. Rocks (ed. 6) xiv. 276 The red feldspar is the potash variety (orthoclase or microcline), which forms the largest crystals in the rock.
2006 P. Sell & G. Murrell Flora Great Brit. & Ireland IV. 287/2 Noble Hawkweed... A local and very scarce species found..on granite, quartz-porphyry (red feldspar) and possibly Moine Schist from 670 to 1,000 m.
extracted from redadj.n.adv.
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