"The Rupelian is, in the geologic timescale, the older of two ages or the lower of two stages of the Oligocene epoch/series. It spans the time between 33.9 and 28.1 Ma. It is preceded by the Priabonian stage (part of the Eocene) and is followed by the Chattian stage." - (en.wikipedia.org 02.03.2020)
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