borrowed from German paläogen, adjective, from paläo- paleo- + -gen (in neogen neogene)
Term introduced by the German geologist Carl Friedrich Naumann (1797-1873) in Lehrbuch der Geognosie, 2. Auflage, 3. Band (Leipzig, 1866), p 8.
1882, in the meaning defined above
“Paleogene.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Paleogene. Accessed 29 Jan. 2023.
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