In the area of the Aggtelek-Rudabánya Mts, limestone and dolomite of reefal and lagoonal facies were formed on a platform, which was continuously deepening from the beginning of the Middle Triassic. The bulk of the limestone is represented by lagoonal formations, extremely rich in dasycladaceans. The reefal formations are of patch reef origin. The almost continuous development and the remarkable abundance of fossils permitted the elaboration of an Anisian-Carnian dasycladacean biostratigraphy. On the basis of investigations 4 assemblage zones could be separated in the Anisian, and 6 in the Ladinian-Carnian. In establishing this biostratigraphy dasycladacean investigations of similar facies areas of the Silica Plateau and the Northern Calcareous Alps were also taken into account.
Authors:Tamás Budai, János Haas, Harald Lobitzer, Olga Piros and Attila Vörös
The Middle Triassic
Wetterstein Limestone was investigated on the Feuerkogel, in the eastern
Höllengebirge area, Austria. Cephalopod-bearing coquina interbeds consisting
predominantly of orthocone cephalopods were found within the dasycladacean
inner platform lagoon facies. Based on sedimentological studies the coquina
beds are interpreted as storm accumulations. Dasycladacean biostratigraphic
data permit assigning the studied succession to the Late Anisian-Early Ladinian
interval. Ammonites of age-diagnostic value found in the coquina horizon
suggest the Avisianum Subzone of the Reitzi Zone that corresponds to the upper
part of the Anisian.
Microfossils from the Cretaceous of the Zengővárkony area were first reported by Sztrókay ( 1952 ), evaluating these remnants of dasycladacean algae ( Sztrókay 1952 ) or unidentifiable microorganisms ( Pantó et