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

44
correlations, but a few trace fossils (pers. comm. by residents and local fossil hunters) already
proved that some parts of the profile belong to different horizons (Lias alpha-zeta) while others
are doubled, hence the Luegwinkel area is most likely shattered by several faults. At the most
southern outcrop (Pl. 6B-D) the Triassic grey limestones are directly overlain by Liassic
sediments with a lot of ammonites that are mostly covered and/or impregnated by
ferromanganese crusts.
� Some details about the stratigraphy and the complicated tectonic situation at Lammeregg have
been published by Gawlick (1998).
Fig. 23. Location map of the outcrops Luegwinkel, Sattelberg and Tannhauser Berg. All three localities are
situated at the northern slope of Hagengebirge respectively of Tennengebirge (extent indicated by the grey area).
Section A-B through Luegwinkel locality is shown in Fig. 24.
Facies Analyses:
� “Red limestone, presumably Lias α2” – Most southern outcrop at Luegwinkel (samples
LW 1, 3, 5, 15): Triassic Dachsteinkalk is directly overlain by ostracod-foraminifer-spicule
biomicrites of Adnet facies type. The lowermost part displays cross sections of different
ammonites and sediment clasts that are covered by a few millimeter thick ferromanganese crust.
The horizon is followed by more sponge dominated biomicrites that partly show clusters of
isolated sponge spicules (thick monaxons, tetraxons, dichotriaens, hexactins) and fragments of
dictyonal skeletons, both embedded in a mixture of allomicrites and microbialites.