| 1. | The anhydrite and gypsum react with organic material to form calcite.
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| 2. | Sulfur will be obtained from pyrites, then gypsum or anhydrite.
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| 3. | The overlying Shell Lake Member consists primarily of anhydrite interbedded with dolostone.
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| 4. | It is often accompanied by anhydrite, carnallite, halite, and kieserite.
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| 5. | Other minerals include anhydrite, augite, and plagioclase.
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| 6. | Complete dehydration of this mixture yields the optimum 2 % ?-anhydrite.
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| 7. | When gypsum dehydrates severely, anhydrite is formed.
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| 8. | The calcium sulfate, anhydrite, was present as phenocrysts in the erupted tephra.
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| 9. | The halite ( salt ) is removed first, leaving behind gypsum and anhydrite.
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| 10. | A geochemical process called anhydrite swelling has been confirmed as the cause of these uplifts.
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