From sharks’ teeth to sea urchins: A palaeontological expedition through the Northern Alpine foreland in Austria

Dr Robert Sturm Over the last few decades, local amateur collectors, as well as professional palaeontologists, have collected a large number of fossils from quarries and sandpits on the northern margin of the Central European Alps. With the help of these marine and terrestrial fossils, it has been possible to reconstruct a picture of the animal life in the early Tertiary (about 50Ma). Interestingly, many animals that lived in these ancient tropical habitats can still be found in the oceans and on the coasts today. Main geological characteristics of the area Fig 1. Upper image: geological map of the Northern Alpine Margin and the alpine foreland near Salzburg in Austria. Lower image: north-south profile through the northern alpine lithology and the alpine foreland clearly indicating that single geological units are superimposed from south to north as a result of the movement of the African plate northwards. As you can see from the map in Fig. 1, the geology of the northern Alpine margin can be subdivided into three main, east-west striking units: The Flysch Zone (green) is situated directly north of the limestone Alps, the exposed part of which reaches a width of up to 20km. The grey marls and sandstones belonging to this unit were deposited in a deep, oceanic basin during the Cretaceous (144 to 65Ma) and measure more than 3,500m in thickness. In the south, the Flysch Zone was successively superimposed on by the Northern Limestone Alps.The Helvetic zone (violet) borders on the Flysch Zone in the … Read More

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