Gneiss oeillé des Lacerandes

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)