Gneiss oeillé des Lacerandes

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Representation and status

Color CMYK
(0%,30%,30%,2%)
Color RGB
R: 250 G: 175 B: 175
Rank
lithostratigraphic unit
Validity
Unit is in Use
Status
informal term

Nomenclature

Deutsch
Lacerandes-Augengneis
Français
Gneiss oeillé des Lacerandes
Italiano
Gneiss occhiadino delle Lacerandes
English
Lacerandes Augengneiss
Origin of the Name

Pointe des Lacerandes (VS)

Historical Variants
zone des gneiss oeillés (Oulianoff in: Lugeon et al. 1942), gneiss oeillé de Liddes-Lacerandes (Thélin & Ayrton 1983), gneiss oeillés de Liddes-Lacerandes (Desmons & Ploquin 1989), Les Lacerandes augengneiss (Bergomi et al. 2017)

Description

Description
issu de la recristallisation en profondeur de schistes (blastes à inclusions)

Age

Age at top
  • Late Ordovician
Age at base
  • Middle Ordovician
Dating Method
Inherited cores of Cryogenian (687 +/-18.5 to 829.3 +/-10.6 Ma) and Ediacaran (567.8 +/-4.1 to 605.3 +/-8.8 Ma) ages ; magmatic overgrowth of 456.4 +/-2.4 Ma (Bergomi et al. 2017)
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