Opoka

Opoka is a carbonate-siliceous marine sedimentary rock. It was formed during the Upper Cretaceous epoch and mainly found in the Great European Plain regions.[1]

Opoka was first described in literature by Georg Gottlieb Pusch in 1833, who named it as Polnische Opoka.[1]

References

  1. 1 2 Jurkowska, Agata Anna; Świerczewska-Gładysz, Ewa (2022-11-07). "Opoka – a mysterious carbonate-siliceous rock: an overview of general concepts". Geology, Geophysics and Environment. 48 (3): 257–278. Bibcode:2022GGEnv..48..257J. doi:10.7494/geol.2022.48.3.257. ISSN 2353-0790. Retrieved 2026-05-07.
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