Lindabrunn conglomerate

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The Lindabrunn conglomerate (also Lindabrunn stone ) is a conglomerate rock that was extracted in Lindabrunn in Lower Austria in three quarries.

Emergence

Lindabrunn conglomerate, detailed view

Around 16 to 13 million years ago, at the time of the geological period Badenium , pebbles and fine sediments were deposited in the tropical sea of the Vienna Basin , with fluctuations in the sea level and the dynamics in the shallow bank area leading to a multi-phase development and subsequently to different types of rock . As a result, the sedimentation was unsettled, several meters thick layers of rubble, light reddish-brown sandbanks (lime arenites ) with a thickness of about 1 m and sandy loam or clay marl layers up to 60 cm overlap alternately ( alternating layers ). This happened under marine conditions and later fresh water inputs in the slowly flattening chalk sea.

The gravel (original river gravel ) consists mainly of clasts of limestone and quartz from alpine regions. In the course of hardening ( diagenesis ), they were primarily cemented with calcitic cements . During this process, rocks were formed which are then referred to as conglomerates when the obvious individual components are over 2 millimeters in size. The sandy-marly intermediate layers also contain shark teeth , ostracod fragments , spherical radiolarians and sea ​​urchin spines .

use

Sculpture park in Lindabrunn

The Lindabrunn conglomerate was probably already in use during Roman times. The mostly fine-grained, yellowish-beige rock was increasingly used for the construction of the first Vienna high spring water pipeline and then for buildings and monuments in the Vienna area. The natural stone, which is partially provided with clay-like inclusions and bound with calcite , is generally dense and even polishable, but is also considered problematic due to its occasional inclusions. On the one hand, the stone has historical significance, was used in numerous buildings from the interwar period in Vienna , but is still broken today and is also used by sculptors .

Lindabrunn conglomerate was used for:

The conglomerate rock is known from the Lindabrunn Sculpture Symposia , which took place annually from 1967 to 1997 in the sculpture park near Lindabrunn.

gallery

  • The wall

  • The wall, detail

  • Lindabrunn conglomerate, structure

swell

  • Friedrich Karrer: Geology of the Emperor Franz Joseph's high spring water line . 20 plates, 96 ills., Numer. Tables. From GBA, Vienna 1877.
  • Franz Xaver Schaffer: Geological guide for excursions in the vicinity of Vienna . 34 Fig., Geolog. Führer XII, Berlin-Zehlendorf 1942, Verlag Gebr. Borntraeger.
  • Alois Kieslinger , Elfriede Mejchar: The stones of the Vienna Ringstrasse, their technical and artistic significance . Verlag Franz Steiner, Wiesbaden 1972, ISBN 978-3-515-00202-8 .
  • JK Rabeder: On the sedimentology and geology of the peripheral facies of the Vienna basin: The Lindabrunn conglomerate . Dipl.-Arb., Univ. Vienna, Vienna, 2001.
  • G. Wessely et al .: Lower Austria. Geology of the Austrian federal states . Geol. Bundesanstalt, 416 S., Vienna, 2006.
  • Friedrich Brix and Benno Plöchinger: Explanations of the geological map of the Republic of Austria 1: 50,000, sheet 76 Wiener Neustadt, GBA, Vienna 1988

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