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Datum level or datum plane
| Словарь стратиграфических терминов |
The base or top of a range of fossils that can be correlated in sections over a wide area (see section 7.c.4).
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Correlated, английский
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Chronosome, английский
The body o f rock enclosed between two markers that may approximate isochronous surfaces and so define the upper and lower limits o f a single period o f deposition within a basin. it is a special type o f chronozone recognized primarily in subsurface practice (schultz, 1982, p. 29).
Formal stratigraphic terminology, английский
Terminology applied to stratigraphic units (formal stratigraphic units) that is properly defined according to an established or conventionally agreed scheme of classification (see section 3.a.5.a).
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