Laagna kihistik
ingl. k. Laagna Member
| Tüüp ja tase | regionaalne litostratigraafia (kihistik) |
|---|---|
| Staatus | kinnitatud standard |
| ESK kinnitatud | Jah |
| Autor | Mens, K., Pirrus, E. (1980) |
| Indeks | EktL |
| Indeks | V2ktL |
| Sünonüümid | Laagnos pluoštas (leedu) Lagnas rida (läti) Лаагнаская (vene) |
| Nime päritolu | Laagna asula, Ida-Virumaal |
| Kuulub | Kotlini kihistu |
| Suhteline vanus | Kotlini lade |
| Litoloogia | hallid mudakivid aleuroliidi vahekihtidega |
| eMaapõu ID | 562 |
Stratotüübid
holostratotüüp: Meriküla F-169 puurauk (109.00..114.50 m) | Mens, 1992 (comp) |
Kirjeldus
From Mens, K., & Pirrus, E. (1997). Vendian. In Geology and mineral resources of Estonia (pp. 35–38). Estonian Academy Publishers:
The Laagna Member has the most restricted distribution area, compared to other members of the formation. In the northeasternmost part of Estonia it is up to 6 m thick. The member consists of grey clayey and silty-clayey argillaceous rocks with many up-to-20-cm-thick intercalations of siltstone. The typical “Laminarites” Clay layers are absent. Scarce organic matter films and small siderite nodules occur suggesting the terminal phase of clay accumulation under weak hydrodynamic conditions.
Viited
Meidla, T. 2017. Ediacaran and Cambrian stratigraphy in Estonia: an updated review. Estonian Journal of Earth Sciences 66(3), p. 152–160. https://doi.org/10.3176/earth.2017.12 PDF
Mens, K., Pirrus, E. 1997. Vendian. Geology and mineral resources of Estonia. Estonian Academy Publishers, Tallinn. p. 35-38.
Mens, K. (comp.) 1992. Каталог стратотипов венда и кембрия Прибалтики [Catalogue of Vendian and Cambrian stratotypes of the East Baltic areas]. p. 1-25. PDF
Mens, K., Pirrus, E. 1980. К стратиграфической номенклатуре вендских отложений Эстонии [On stratigraphical nomenclature of Vendian beds of Estonia]. Eesti NSV Teaduste Akadeemia Toimetised. Geoloogia / Известия Академии наук Эстонской ССР. Геология 29(2), p. 49-54. https://doi.org/10.3176/geol.1980.2.01 PDF
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