(geology) A formal time-stratigraphic unit used to specify strata equivalent in time span to a zone in another type of classification, for example, a biostratigraphic zone. Also known as chronostratigraphic zone. The smallest subdivision of chronostratigraphic units, below stage, composed of rocks formed during a chron of geologic time.
chronozone
| Sci-Tech Dictionary: chronozone |
(krän·ə′zōn)
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 | chron (geology) |
| stage |
| Jaramillo reversal |
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