| 31. | Amphibole crystals are enclosed in intersitital plagioclase crystals and sometimes contain secondary biotite crystals.
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| 32. | Cummingtonite shares few compositional similarities with alkali amphiboles such as arfvedsonite, glaucophane-riebeckite.
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| 33. | The ash flows are K-rich andesitic-dacitic and contain amphibole and biotite.
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| 34. | These are generally called amphibole asbestos.
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| 35. | Glaucophane, crocidolite, riebeckite and arfvedsonite form a somewhat special group of alkali-amphiboles.
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| 36. | Feldspar, amphiboles, pyroxenes, and volcanic glass are the principle donors of clay minerals.
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| 37. | It is considered an intermediate between the amphiboles glaucophane and magnesioriebeckite, which form a series.
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| 38. | Its composition is of tremolitic amphibole.
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| 39. | Amphiboles can be green, black, colorless, white, yellow, blue, or brown.
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| 40. | Pargasite is a rare magnesium-rich amphibole with essential sodium, usually found in ultramafic rocks.
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