Plassenkalk
The Plassenkalk is a lithostratigraphic formation in the Northern Limestone Alps . The formation can be found in the higher, southern parts of the Northern Limestone Alps and marks the Jura - Chalk border area there. Their type locality is the Plassen near Hallstatt , further occurrences can be found northeast of the Wolfgangsee and in the Styrian Salzkammergut .
genesis
The Plassenkalk was deposited in a shallow tropical sea around 155 to 140 million years ago. In his younger sections he repeatedly shows signs of reef growth. Various reef fossils such as corals , sponges and hydrozoans , and rarely extremely high-towered snails, the nerinees, are characteristic.
This massive or coarsely banked, often pure white, occasionally also pale yellow or brownish, massive limestone has the highest chemical purity of all limestones in the Northern Limestone Alps. Because of its high degree of whiteness, it is also used industrially.
literature
- Harald Lobitzer: Geological walks: Ausseerland - Salzkammergut . Ed .: Publishing house of the Federal Geological Institute in Vienna with the Kammerhof Museum Bad Aussee. Vienna 2011.
