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

Localities (Facies and Sponge Analyses) 43
degree thin-rayed monaxons and hexactins of non-rigid lyssacinosid species occur scattered in
between.
� “Transition between Adnet Formation and Allgäu Formation” (samples RJ 9-10): The
outcropping section exposes red limestones of the Adnet facies that changes upward into grey
limestones of the Allgäu Formation. The Adnet limestones are formed by ostracod-foram
biomicrites with a very low content of isolated sponge spicules. The microfacies of the grey
limestones above is similar to that of Scheibelberg facies type and also show only a few sponge
spicules that are mainly thin monaxons and hexactins belonging to hexactinellid specimens.
Sponge Analyses:
� The Lower Liassic breccias are build by clasts of former red spiculites. Most likely they were
reworked and dislocated due to the subsidence of the local basin that began to form on top of the
drowned platform area as shown by the succession from red platform limestone to grey
limestones of basinal settings. In the spiculites, most of the sponge spicules are unequally
scattered hence they do not show any configuration of skeletal structures. Thus most remains
seem to be of allochthonous to parautochthonous origin. In contrast, the grey facies type of the
Allgäu Formation does not show demosponge spicules any more but instead of that a small
amount of mainly thin monaxons and hexactins which presumably belongs to lyssacinosid
specimens from deep water environments.
4.12. Luegwinkel (LW)
Geological Setting:
� The locality Luegwinkel is situated southeast of Golling about 150 m NNE of the road to Paß
Lueg (Fig. 23). The site is accessible by keeping right at the junction just behind the Lammer
bridge. After about 500 m a trail leads in east direction into the forest, where Liassic limestones
are exposed at one big (ÖK50 / Blatt 94 Hallein, R 07 3940, H 52 7128) and several smaller outcrops
(Fig. 24).
� At Luegwinkel the Triassic Dachsteinkalk (at top with forams of Triasina sp.) is overlain by
different Liassic red limestones of mainly Adnet facies type. The Triassic-Jurassic boundary
section is exposed at a 4-5 m high and about 30 m long wall section along a runnel (Pl. 6A), in
opposite to the Strubberg Fm. that builds the lower slope of the northeastern mountain (elevation
of 690 m). Southwest of this large-sized outcrop there are several small sites inside the forest,
where different Liassic red limestones crop out in alternation with Triassic grey limestones. The
small and separated outcrops of the Liassic limestones do not allow specific stratigraphic