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Etimologi
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troctolite jinis rock intrusive mafic. iku kasusun ateges Jumlah utama nanging maneko rupo olivine lan calcic plagioclase bebarengan karo pyroxene suntingan. iku anorthosite-sugih olivine, utawa sing relatif pyroxene-kurang saka gabbro
christian Leopold von Buch
saka troklotit german, saka trōktēs greek, iwak segara (dijupuk dadi sejenis iwak)
rock grained coarse, rock opaque
tachylite punika wangun vitreous saka kaca vulkanik basaltic. kaca iki alami dening cooling kanthi cepet saka basalt molten
saka tachylite german, saka tachy- + lutos greek telat, leleh
awet rock, medium atose rock
rock grained coarse, rock grained nggoleki, medium rock grained, rock opaque