Hochwipfel Formation

The Hochwipfel Formation can be subdivided into 4 lithofacies: a – Quartz-arenite to lithic sandstone, siltstone and shale in beds with thickness from few to 30 cm with turbiditic features. The lithology division A, B, C and D of the Bouma sequence (Bouma turbidite facies model, according to the classification of Walker & Mutti (1973), are frequently recognized within lithofacies a. Locally the lithic sandstone yield fossil plant remains. b – Silicatic rudite, breccia and conglomerate made mainly by radiolarian chert clasts, and rare clasts of sandstone and siltstone, very rare basic volcanics and quartz clasts are also present. The siliciclastic rudite may reach thickness of 30-40 m. c – Limestone rudite mainly constitutes by clasts derived from the Upper Devonian limestone, and subordinate radiolarian chert, sandstone and siltstone. The limestone rudite are sporadically interbedded within the lower part of the formation, their thickness varies from few dm to 3 m. At places limestone clasts rich in crinoid debris (encrinites) of late Visean age are present. d – Acid volcanic and sub-volcanic (tuffs) products (Keratophyres: Gortani, 1906; Gentili & Pellizzer, 1964; Vai in Braga et al., 1971).