Syndepositional deformation in the Kurkiselkä esker, Kiiminki, Finland
| Autor: | R. Aario |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 1971 |
| Předmět: | |
| Zdroj: | Bulletin of the Geological Society of Finland, Vol 43, Iss 2, Pp 163-172 (1971) |
| Druh dokumentu: | article |
| ISSN: | 0367-5211 1799-4632 |
| DOI: | 10.17741/bgsf/43.2.003 |
| Popis: | Syndepositional and metadepositional deformation structures from an esker section in Kiiminki, Finland, are described and discussed. The small folds are suggested to be a response of cohesive, hydroplastic material to the drag of turbulent flow, and the accompanying differential pressure conditions. The data indicate a rippling mechanism. The small folds have a transition into more complicated structures derived mainly from syndepositional or metadepositional horizontal movements, apparently in part gravity-induced, which operated contemporaneously with the rippling mechanism. The syndepositional deformation structures of the category described are rather common in the Oulu vicinity, probably due to the widespread occurrence of water-laid deposits composed of fine sand, a grain size that favours this kind of deformation. They can readily be confused with deformation structures of other origin, which exist in juxtaposition within the same area. |
| Databáze: | Directory of Open Access Journals |
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