strati.ch - Lessico lithostratigrafico della Svizzera

Rappresentazione e statuto

Varianti storiche: fossilführenden Kalken des Sonnenberges, Fossilhorizont des Sonnenberges (Trümpy in: Brückner et al. 1957, Fisch 1961), Sonnenberg-Serie (Rutsch et al. 1966), Sonnenberg-Bank am Fuggstock, Sonnenberg horizons (Nio 1972, Letsch et al. 2015), Sonnenberg-Horizont (Hantke et al. 2019)

Descrizione: dunkelblauer Kalk mit Gastropoden und Echinodermen ; vulkanische Brekzie" / fossilleeren marmorisierten hellen Kalke mit Spilit- und Schieferfetzen

Unità di rango inferiore

Geomorfologia

Età alla base

Termini generici

Tipo di origine

Definizione: Brückner W., Heim Arn., Ritter E., Staub R., Trümpy R. (1958) : Bericht über die Jubiläumsexkursion der Schweizerischen Geologischen Gesellschaft durch die Glarneralpen. Eclogae geol Helv. 50/2, 509-

Revisione: Letsch Dominik, Winkler Wilfried, von Quadt Albrecht, Gallhofer Daniela (2015) : The volcano-sedimentary evolution of a post-variscan intramontane basin in the Swiss Alps (Glarus Verrucano) as revealed by zircon U-Pb age dating and Hf isotope geochemistry. International Journal of Earth Sciences (Geologische Rundschau) 104, 123–145

p.128: The subordinate occurrence of sediments, lacking the typical red colour and the poor sorting of the two main Verrucano facies, deserves attention. They occur either as lense-shaped or laterally continuous thin packages of some 10 m thickness (so-called Sonnenberg horizons, Nio 1972). Even though they do not all belong to one and the same stratigraphic horizon, they only occur in a certain stratigraphic interval. They are composed of dark grey, pyrite- and mica-bearing arcosic sandstones (Fig. 7c), dark freshwater limestones with questionable fossils (probably gastropods, Schielly 1964), dark pelites (Fig. 7d), and distinctive conglomerate layers (Trümpy in Brückner et al. 1957). The latter may exhibit planar cross-bedding (Amstutz 1957) and are composed of remarkably well-rounded crystalline pebbles. One of these conglomerate layers (the Chammseeli conglomerate) has been sampled for detrital zircons in the present study.