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epidote

   Also found in: Encyclopedia, Wikipedia 0.01 sec.
ep·i·dote  (p-dt)
n.
A lustrous yellow, green, or black mineral, Ca2(Al, Fe)3(SiO4)3OH, commonly found in metamorphic rock.
[French épidote, from Greek epididonai, to give in addition, increase (from the greater length of its crystals compared with those of related minerals) : epi-, epi- + didonai, to give; see d- in Indo-European roots.]
epi·dotic (-dtk) adj.
epidote  (p-dt)
A yellowish-green or blackish-green monoclinic mineral. Epidote occurs as formless grains or as prism-shaped crystals, and is found in limestones that have undergone slight metamorphism or in igneous rocks. Chemical formula: Ca2(Al, Fe)3(SiO4)3OH.
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The mineralogy is 40% plagioclase (3% of which is myrmekitic), 29% quartz, 28% potassium feldspar (microcline and orthoclase), 3% biotite, with trace magnetite and rare epidote and chlorite.
Geology of the Parliament Buildings 5: Geology of the Manitoba ... by Young, Jeff / Geoscience Canada
About a mile beyond Gilman Lake, you come upon the first of the two Hoover Lakes (9,800 feet), twin jewels in talus fields at the southeast foot of crumbling 10,964-foot Epidote Peak.
YOSEMITE'S BACK DOOR LEADS TO LAND OF LAKES by Daily News (Los Angeles, CA)
Magnetite, epidote, chlorite and pyrite is associated with the copper mineralization.
Mega Uranium Ltd.: Wide Copper-Gold-Silver-Molybdenum Zones Establish ... by Business Wire
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