单词 | chronozone |
释义 | chronozone [krän·ǝ´zōn] GEOLOGY 1. 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. 2. The smallest subdivision of chronostratigraphic units, below stage, composed of rocks formed during a chron of geologic time. |
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