Last Updated
：2025/11/29
supereon
Sense（1）
（ plural ）
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(geology) A time period encompassing more than one eon, principally used to characterize the Precambrian.
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supereon
The rock layers revealed that the region had been stable for a supereon before the mountain-building episode.
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The rock layers revealed that the region had been stable for a supereon before the mountain-building episode.
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