最終更新日：2024/07/28

(geology) of a geologic period within the Mesoproterozoic era from about 1600 to 1400 million years ago

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Calymmian

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Calymmian

adj

(geology) of a geologic period within the Mesoproterozoic era from about 1600 to 1400 million years ago

The Calymmian period was characterized by intense volcanic activity.

意味（1）

(geology) of a geologic period within the Mesoproterozoic era from about 1600 to 1400 million years ago