Lacustrine deposits occurring in the Jibou Formation (Late Maastrichtian – Lutetian) were mentioned in the Rona village area since the first half of the 19th century. Hungarian and Romanian geologists also carried out several researches in the last century, referring to the so-call “Rona Limestone” or “Rona Member”. In the last years, new outcrops resulted as a consequence of works made for the Botanical Garden at Jibou, adding details concerning mainly the base of the lacustrine succession. The new geological section from Jibou Botanical Garden should complete the old stratotype of the "Rona Limestone”, as a hypostratotype.
Codrea, Vlad A. and Săsăran, Emanoil
A revision of the Rona Member,
Studia UBB Geologia
Available at: http://scholarcommons.usf.edu/geologia/vol47/iss2/art4