Membre de la Leyderry

Darstellung und Status

Farbe CMYK

(0%,11%,26%,31%)

Farbe RGB

R: 175 G: 155 B: 130

Rang

lithostratigraphisches Member (Subformation)

Gebrauch

Element ist in Gebrauch

Status

gültiger formeller Begriff

Nomenklatur

Deutsch

Leyderry-Member

Français

Membre de la Leyderry

Italiano

Membro della Leyderry

English

Leyderry Member

Herkunft des Namens

La Leyderry (VD), Ormont-Dessous

Historische Varianten

Conglomérat du Leyderry (Badoux & Homewood 1978, Badoux & Gabus 1991), Leyderry member (Ringgenberg et al. 2001), conglomérat du Lédery [sic] (Carrupt 2003)

Beschreibung

Mächtigkeit

100-120 m (Badoux & Gabus 1991), 25-50 m (Ringgenberg et al. 2001).

Hierarchie und Abfolge

Übergeordnete Einheit

• Formation de la Grande Eau

Hangendes

• Membre des Grès de Passage

Liegendes

• Membre de la Raverette

Alter

Alter Top

• Bathonien

Bermerkungen zu Top

?

Alter Basis

• Bathonien

Bermerkungen zu Basis

?

Datierungsmethode

Par analogie avec les oolites de la Formation de l'Infra-Niesen (Lempicka Münch 1996).

Geografie

Typusregion

Vallée de la Grande Eau, entre Le Sépey et la Forclaz

Paläogeografie und Tektonik

Herkunftstyp

• sedimentär

Referenzen

Erstdefinition

Badoux H., Homewood P. (1978) : Le soubassement de la nappe du Niesen dans la région du Sépey (Alpes vaudoises). Bull. Soc. vaud. Sci. nat. 74/1, 15-23

Neubearbeitung

Ringgenberg Yann, Tomassi Alexander, Stampfli Gérard M. (2001) : The Jurassic sequence of the Niesen nappe in the region of Le Sépey - La Forclaz (Swirtzerland): witness of the Piemont rifting in the Helvetic paleogeographic domain. Bull. Soc. vaud. Sci. nat. 87/4, 353-372

p.360: 2.1.3. Leyderry member (Bathonian?) These polygenic conglomerates are 50 m thick along the Sépey-Diablerets road and less than 25 m in the Grande Eau gorge. They have no internal structures (disorganized conglomerates) and elements are decimetric. The main elements are dolomites, gneiss, quartzites, black limestones, rhyodacites, dolerites, rhyolites, green sandstones, volcanoclastic rocks and green rocks of probable metamorphic origin. The calcareous gritty matrix looks like the Raverette member but we can find contemporaneous resedimented ooliths from the base to the top of the member. Based on an analogy with the findings of Lempicka Munch (1996) on the Infra-Niesen Fm, in which ooliths are of Bathonian age, we assumed that ooliths described herein are also of Bathonian age. Therefore, a Bajocian age is assumed for the underlying Raverette member, in which no ooliths are found.