Yellow Member
Retour à nappe d'AntigorioReprésentation et statut
- Couleur CMYK
- (0%,0%,0%,100%)
- Rang
- Membre lithostratigraphique (Sous-formation)
- Usage
- Ce terme est en usage.
- Status
- terme incorrect (mais utilisé de manière informelle)
Nomenclature
- Deutsch
- Gelbes Member
- English
- Yellow Member
- Variantes historiques
- «yellow member» (Matasci et al. 2011)
Hiérarchie et succession
- Unités sus-jacentes
Paléogéographie et tectonique
- Type de protolithe
-
- sédimentaire
- Métamorphisme
- monocyclique
Références
- Définition
-
(2011) :
The Teggiolo zone: a key to the Helvetic–Penninic connection (stratigraphy and tectonics in the Val Bavona, Ticino, Central Alps). Swiss J. Geosci. 104, 257–283
p.262: The lower part has a characteristic yellowish to brownish color (‘‘yellow member’’). The base of this member is banded and consists in an alternation of cmor dm-thick beds of slightly impure limestones (10–20% of fine-grained quartz, feldspar, mica and dolomite), with more impure and more coarsely quartzic and micaceous limestones or calcschists (Fig. 3). It passes very progressively upwards, by attenuation of the bedding and increasing purity, to a more homogenous and massive, still yellowish limestone. The protolith of this sequence must have been an alternation of beds of more or less argillaceous limestones and marls, with decreasing upwards content in clay minerals and other fine-grained detritals.