Diechtergletscher-Formation

Rappresentazione e statuto

Index

hD

Colore CMYK

40 / 20 / 40 / 0

Colore RGB

R: 160 G: 180 B: 140

Rango

Formazione litostratigrafica

Uso

Unità in uso.

Status

termine informale

Nomenclatura

Deutsch

Diechtergletscher-Formation

Français

Formation du Diechtergletscher

Italiano

Formazione del Diechtergletscher

English

Diechtergletscher Formation

Origine del nome

Diechtergletscher (BE), Guttannen

Varianti storiche

N.N. (Fischer 1905), Diechtergletscher-Formation (Schenker 1986b, Schenker 1987, Labhart & Renner 2012), Diechtergletscher Formation (Berger et al. 2017)

Gerarchia e successione

Unità di rango inferiore

• Maasplanggstock-Metaandesit
• Garwiidi-Diorit

Età

Geomorfologia

• Late Pennsylvanian

Età alla base

• Late Pennsylvanian

Geografia

Estensione geografica

Ofenhoren - Gwächtenhoren - Triftstöckli.

Paleogeografia e tettonica

Paleogeografia

placca continentale europea

Termini generici

• Aar

Referenze

Definizione

Schenker Franz (1986) : Spätpaläozoischer saurer Magmatismus und Beckenbildung im Aar-Massiv unter kompressiver Tektonik. Diss. Univ. Bern

Revisione

Berger Alfons, Mercolli Ivan, Herwegh Marco, Gnos Edwin (2017) : Geological Map of the Aar Massif, Tavetsch and Gotthard Nappes. Geological Special Map 1:100'000, Explanatory Notes 129

p.43: SCHENKER (1986), SCHENKER & ABRECHT (1987) and OBERHÄNSLI et al.(1988) described in detail the stratigraphic characteristics of the Diechtergletscher Formation and its relationships with the Central Aar Granite (Fig.6). SCHENKER & ABRECHT (1987) illustrated the thermal effect of the intrusion on the metasedimentary and volcanic rocks of the Diechtergletscher Formation (Fig.7b). Biotite-garnet and andalusite-biotite-muscovite parageneses in the clay member indicate temperatures far higher than the regional Alpine metamorphism in this area and are therefore interpreted as a contact aureole produced by the intrusion of the Central Aar Granite.
OBERHÄNSLI et al.(1988) associated the Diechtergletscher Formation to older sequences in the Cavardiras area (the Cavardiras Group of the present map sheet, see Tab. 2 and p. 33). These authors attributed small isoclinal folds to a Variscan deformation event, similar to that affecting the rocks of the Cavardiras Group. These deformed sedimentary rocks were then later affected by the intrusion of the Central Aar Granite. As deformation is extremely heterogeneous in all the Carboniferous rocks, the deformation argument was not taken into account. Therefore, the Diechtergletscher Formation was included in the Diechtergletscher-Tscharren Zone.