Porifera-microbialites of the Lower Liassic (Northern Calcareous ...

28
� Some samples of red Adnet limestone facies overlying Triassic reef facies were taken at the
southwestern slope. They display a facies (with ferromanganese crusts) of unknown stratigraphic
position (Pl. 4D). More extensive sampling of the crucial sequence at the western slope of Wilde
Kirche reef was inhibited due to its hardly accessible position. Samples for stable isotope
analyses derives from a former outcrop of the Triassic-Jurassic boundary (samples: Collection of
Joachim Reitner, GZG Göttingen) that was situated at the transition between Pasill-Alm and the
base of Fonsjoch slope. It comprises Triassic Kössen limestones, Liassic boundary marls of the
Prä-Planorbis zone and Planorbis zone.
� Studies about stratigraphy and biostratigraphy at Fonsjoch and Wilde Kirche reef locality are
given by Blind (1963), Fabricius (1966), Lange (1952), Riedel (1988) and Satterley et al. (1994).
4.6. Rötelwand Reef (RÖ) + Grobriedel (GR)
Geological Setting:
� The Upper Rhaetian coral reef at the Rötelwand/Looswand (ÖK50 / Blatt 94 Hallein,
R 07 4340, H 52 8450) is situated south of the lake Hintersee between the two villages Gaißau and
Hintersee (Fig. 12). It is accessible by a trail that starts southeast of Gaißau and leads to the
Ladenberg and Grobriedel mountain.
� According to Schäfer (1979) the sequence of Triassic reef limestone should be overlain by
2 m of very badly preserved, red Liassic limestones followed by some meters of cherty grey
limestones (Hornsteinknollenkalke).
Fig. 12. Location map of the
Rötelwand and Feichtenstein
Reef complexes and the outcrop
at the southwestern flank of
Grobriedel mountain.