• captainlezbian@lemmy.world
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      3 days ago

      The boundary between the mesozoic (era of the non avian dinosaurs, beginning with the great dying and ending with the extinction of the non avian dinosaurs) and the cenozoic (era associated with mammalian dominance, beginning with the k-pg extinction event and currently ongoing, but we’ll see how the anthrogenic extinction event goes)

      Basically, it’s the time of the famous asteroid and its fallouts such as massive climatic shifts, dust clouds choking out plant life, etc. It was a really bad time, especially for things that weren’t small omnivorous generalists like our ancestors and birds.

        • captainlezbian@lemmy.world
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          3 days ago

          I actually didn’t know so I looked it up. It seems k is for cretaceous because c was already an abbreviation for a geological era, and pg is for paleogene which is the first part of the cenozoic era. Looks like the name is also somewhat recent and it used to be called the k-t boundary with t meaning tertiary