Randecker Maar

The Randecker Maar is a maar – a volcanic crater about 1.2 kilometres (0.75 miles) wide. It is in the alps of the Swabian Jura near Stuttgart and was formed around 17 million years ago. A lake formed in the crater and its bed is now a layer of the early Miocene in which many fossils have been found.[1] Nowadays, the crater is drained by the Zipfelbach brook and so there is no longer a lake.

Randecker Maar
LocationSwabian Jura
Coordinates48°34′27″N 9°31′23″E
RangeAlps
Width1.2 kilometres (0.75 mi)
Ageearly Miocene

The northeastern wall of the crater has eroded and opens to lower ground. This forms a natural pass for the seasonal migration of birds and insects as they fly up and over the alps. This makes it a good point for observing these creatures and so an observatory was established there in 1969 by ornithologist Wulf Gatter – Forschungsstation Randecker Maar e.V..

The maar and gorge of the Zipfelbach were designated as a nature reserve by local ordinances in 1971 and 1990 to preserve the landscape and its fauna and flora for science and popular enjoyment. The area conserved is now 110 hectares (0.42 square miles).[2]

  • A view to the NNE showing the pass and the Limburg beyond

References
  1. James Jepson; David Penney (2014), Fossil Insects, Siri Scientific Press, p. 180, ISBN 9780957453067
  2. Reinhard Wolf; Ulrike Kreh (2007), Die Naturschutzgebiete im Regierungsbezirk Stuttgart, Ostfildern: Thorbecke, pp. 480–482, ISBN 978-3-7995-5176-2

Further reading
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