celadonite


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celadonite

[′sel·ə·də‚nīt]
(mineralogy)
A soft, green variety of mica having high iron content and containing silicates of magnesium and potassium.
References in periodicals archive ?
The secondary minerals nontronite and locally celadonite represent the first crystallised species lining the outer part of the cavities Other mineral phases occurring during the early stage were calcite and cryptocrystalline silica Nontronite was probably formed by basalt devitrification due to hydration, although ferromagnesian mineral phases present in the basalts might have also contributed to its formation.
Thomsonite, phillipsite, chabazite, analcime, natrolite, mesolite, stilbite and scolecite were associated with nontronite and celadonite in amygdales Chabazite, analcime, thomsonite, laumontite and stilbite were associated with quartz and calcite in veins Zeolites deposited in basalts vesicles and veins were the result of a hydrothermal process, having a variety of species and this was due to reduced Si activity in the fluid.
Amygdaloidal basalt flows have amygdale fillings principally of celadonite and silica minerals, with minor amounts of zeolite.
Celadonite, silica minerals, "heulandite," analcime, and chabazite predominate in amygdales in the basalt flows and in basalt clasts in the McCoy Brook Formation, suggesting that these minerals were "early" (Fig.