Membre des Prés Roses
Torna a Lörrach-FormationRappresentazione e statuto
- Colore CMYK
- (0%,0%,0%,100%)
- Colore RGB
- R: 230 G: 140 B: 95
- Rango
- Membro litostratigrafico (Sotto-formazione)
- Uso
- Unità in uso.
- Status
- termine formale valido
Nomenclatura
- Deutsch
- Prés-Roses-Member
- Français
- Membre des Prés Roses
- Italiano
- Membro dei Prés Roses
- English
- Prés Roses Member
- Origine del nome
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Prés Roses (JU), au sud-ouest de Delémont
- Varianti storiche
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Près Roses Member [sic] (Pirkenseer et al. 2018)
- Nota sul nome
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Correspond au «Banc à Ostrea cyathula» du bassin de Delémont, à ne pas confondre avec l'«Horizon à Ostrea cyathula» (= Membre de Therwil, nettement plus jeune) du bassin de Laufon et de la région bâloise (partie méridionale du fossé du Haut-Rhin).
Descrizione
- Potenza
- 0,1-2 m le long de la Sorne (Liniger 1925, Weidmann 1990)
Gerarchia e successione
- Unità di rango superiore
- Unità sottostante
Geografia
- Estensione geografica
- Unité restreinte au bassin de Delémont.
- Regione-tipo
- Bassin de Delémont (JU)
Referenze
- Definizione
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(2018) :
A revised Palaeogene lithostratigraphic framework for the Northern Swiss Jura and the Southern Upper Rhine Graben and its relationship to the North Alpine Foreland Basin. Riv. Italiana Pal. Strat. 124/1, 163–246
p.192: A bed of densely packed complete or fragmented oyster shells within a sandy to marly matrix, ranging in thickness from 0.1 to 2 m (Sorne section, Liniger 1925; Weidmann 1990). It is interpreted as a lateral lagoonal member of the Lörrach Fm restricted to the Delémont subbasin. Thickness varies considerably in the area of deposition. The member transgresses bioerosively either directly on the underlying Rossemaison Fm (HRT-F8/9, 19.22 to 19.14 m / 22.85 to 22.25 m; COM-F5, 65.0 to 61.4 m), or is intercalated in the proximal extension of the Pulversheim (Près Roses, Sorne river) or Lörrach Fm (ridge near Develier; Liniger 1925).