| 41. | The distinctive character of feldspar in hypersolvus granite is to present exsolution textures.
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| 42. | That is because the high temperature feldspar was perthitic.
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| 43. | From Hauterivian to Albion ages the sandstones are more mixed with more feldspar.
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| 44. | Feldspar-phyric basalt lava flows are normally pillowed.
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| 45. | Mineralogically the fine-grained phenocrysts consist of quartz, feldspars and biotite.
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| 46. | Minerals in the tonalite are quartz, plagioclase, alkali feldspar and hornblende.
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| 47. | The hill is composed of feldspar porphyry, its summit of compacted feldspar.
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| 48. | The hill is composed of feldspar porphyry, its summit of compacted feldspar.
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| 49. | Centrex has developed a process to convert potassium feldspar into potassium fertiliser products.
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| 50. | The underlying geology consists of rocks rich in quartz, feldspar, and mica.
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