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“Volcanic” agate deposits are chiefly found in tholeiitic, calc-alkaline igneous provinces, in basalts and andesites. Occasionally they are found in trachytes and latites.

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Discussion and Conclusion

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  • 发表日期：

    2025年

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  • Andrejs Zarins

摘要

“Volcanic” agate deposits are chiefly found in tholeiitic, calc-alkaline igneous provinces, in basalts and andesites. Occasionally they are found in trachytes and latites.