| 41. | These sediments preserved the aragonite of the shells, preventing it from converting to calcite.
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| 42. | Shells are almost always composed of polymorphs of calcium carbonate-either calcite or aragonite.
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| 43. | Aragonite will change to calcite at 380 470 �C, and vaterite is even less stable.
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| 44. | Major commodities which are dependent on the port include citrus exports, cement and aragonite imports.
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| 45. | The shells are formed of aragonite, although the cameral deposits may consist of primary calcite.
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| 46. | Cuttlebone is composed primarily of aragonite.
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| 47. | The interior is covered with dazzling white crystals composed of gypsum, calcite, and aragonite.
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| 48. | The shells are usually preserved as calcium carbonate usually any aragonite is pseudomorphed with calcite.
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| 49. | We are actually living in aragonite sea period currently, so my answer now seems inconsistent.
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| 50. | The resultant white carbonate ( aragonite ) is the same mineral that makes up natural coral reefs.
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