| 41. | Amphibole crystals are enclosed in intersitital plagioclase crystals and sometimes contain secondary biotite crystals.
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| 42. | The largest documented single crystals of biotite were approximately sheets found in Iveland, Norway.
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| 43. | The dam sat on a foundation of silt and stable biotite gneiss ( rock ).
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| 44. | Biotite and all ferromagnesian minerals rarely appear in them, and never in considerable amounts.
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| 45. | For physical and optical identification, it shares most of the characteristic properties of biotite.
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| 46. | In 1847 he coined the mineral name biotite in honor of physicist Jean Baptiste Biot.
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| 47. | Their commonest minerals are olivine, anorthite, hornblende, augite, biotite and leucite.
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| 48. | The younger calcalkaline granites mostly have coarse crystals, they are biotite and hornblende granodiorites.
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| 49. | The dacites contain phenocrysts of biotite and large feldspar crystals embedded in an oxidized groundmass.
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| 50. | The Caolingshan Basalt consists of olivine and pyroxene, with crystals of biotite and plagioclase.
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