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Interthem
| Словарь стратиграфических терминов |
A minor unconformity-bounded unit comparable in thickness with a formation or in time span with a stage (chang, 1975, p. 1544). several interthems may be recognized within a synthem.
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Unconformity, английский
- A surface of erosion between rock bodies, representing a significant hiatus or gap in the stratigraphic succession. unconformities result from the subaerial or subaqueous exposure of rocks below the unconformity and erosion with loss of part of the older rocks (see section 6.b.2).
- A substantial break or gap in the geologic record where a unit is overlain by another that is not in stratigraphic succession. compare - conformity, discontinuity. gg part 629 - glossary 629-83 (430-vi-nssh, 2008)
- A surface of erosion which separates rocks of two substantially different
Comparable, английский
Сравнимый; аналогичный
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Total vacuity, английский
A missing interval or hiatus in a stratigraphic sequence caused by both erosion and nondeposition (wheeler, 1958b, p. 1058).
Pedoderm, английский
A mappable unit mantle o f soil, entire or partially truncated, at the earth`s surface or partially or wholly buried, which has physical characteristics and stratigraphic relationships that permit its consistent recognition and mapping.
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