| 1. | His successful dealing with pyritic ores marked him out as a great metallurgist.
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| 2. | In warm climates it is possible to leave pyritic ore out in the rain.
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| 3. | The Clegg Creek is a brownish black pyritic shale that is rich in organic matter.
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| 4. | The Blocher consists of brownish-black to grayish-black, slightly calcareous pyritic shale.
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| 5. | The Morgan Trail is a brownish-black to olive-black fissile siliceous pyritic shale.
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| 6. | He also helped increase copper production in Kyshtym, Russia, through the use of pyritic smelting.
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| 7. | Copper production, using pyritic smelting, eventually reached 25, 000, 000 pounds a year.
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| 8. | Gold is associated with silicic, kaolinitic, and pyritic alteration of greenschist-grade felsic metavolcanics.
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| 9. | In the upper part, intercalations of black shale with gypsum flakes and abundant pyritic micritical concretions appear, some with ammonites.
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| 10. | The Antrim is a brown to black, pyritic, highly laminated and organic-rich shale, from 60 to 220 feet thick.
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मोबाइल