45°36′18″N 17°31′55″E / 45.604961°N 17.532028°E / 45.604961; 17.532028

Columnar rhyolite at Rupnica

Rupnica is an outcrop of columnar-jointed rhyolite in Croatia.[1] It lies in the southwest of Voćin. The site used to be a quarry but is now a natural heritage. On 14 October 1948 Rupnica was declared the first natural heritage site of Croatia.

References

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  1. ^ Balen, D.; Radonic, G.; Pavic, G. (2010). Order and disorder in columnar joints of Rupnica Geosite (Papuk Geopark); in 4th Croatian Geological Congress Abstracts. Zagreb: Croatian Geological Institute. pp. 137–138. ISBN 978-953-6907-23-6.