| 1. | This bed ranged from to thick and contained iron pyrite as well.
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| 2. | One of his most distinctive motifs-the cube-directly developed from his use of square-shaped iron pyrites.
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| 3. | However, it proved to be valueless iron pyrite and was eventually salvaged for road metalling.
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| 4. | This rarely encountered solid is structurally similar to that of iron pyrite ( FeS 2 ).
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| 5. | She was carrying iron pyrites and a general cargo and was bound for Leith and Hull.
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| 6. | Aznalcollar Mines, an iron pyrite mining company, used the lake to hold water laden with metal residues.
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| 7. | The iron pyrite then preserved the fossil.
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| 8. | There are indications that the " Iceman " called �tzi may have used iron pyrite to make fire.
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| 9. | The iron pyrites in the clay can heat up when exposed to the air and occasionally ignite the shales.
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| 10. | Iron pyrite was heaped up and allowed to weather ( an example of an early form of heap leaching ).
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