Dan Peppe
@danpeppe.bsky.social
Paleobotanist, paleoclimatologist, & geologist. I study fossil plants, ancient climate, and the Earth's magnetic field. (he/him)
Linking Earth’s Ancient Flora, Fauna, and Climate (LEAFF Climate) Lab
https://sites.baylor.edu/daniel_peppe/
Linking Earth’s Ancient Flora, Fauna, and Climate (LEAFF Climate) Lab
https://sites.baylor.edu/daniel_peppe/
This is so fascinating. Do you think mammal communities were more broadly distributed or that some change during the Holocene prompted migration?
October 29, 2025 at 12:33 PM
This is so fascinating. Do you think mammal communities were more broadly distributed or that some change during the Holocene prompted migration?
Such an awesome illustration!
October 28, 2025 at 12:41 PM
Such an awesome illustration!
Reposted by Dan Peppe
Lastly, this N-S bioprovincialism persists after the mass extinction and is seen in early Paleocene mammalian communities suggesting that the biogeographic structure was not destroyed by the mass extinction event.
October 23, 2025 at 6:10 PM
Lastly, this N-S bioprovincialism persists after the mass extinction and is seen in early Paleocene mammalian communities suggesting that the biogeographic structure was not destroyed by the mass extinction event.
Reposted by Dan Peppe
We then used ecological modeling to show dinosaur communities were partitioned into two different bioprovinces during the terminal Cretaceous across western North America, driven by differences in climate. This suggests dinosaurs in North America diverse & thriving leading up to the K/Pg boundary.
October 23, 2025 at 6:10 PM
We then used ecological modeling to show dinosaur communities were partitioned into two different bioprovinces during the terminal Cretaceous across western North America, driven by differences in climate. This suggests dinosaurs in North America diverse & thriving leading up to the K/Pg boundary.
Reposted by Dan Peppe
This Naashoibito dinosaur community was dominated by the giant sauropod Alamosaurus and crested Lambeosaurine hadrosaurs, which is a marked difference than the coeval Hell Creek Formation.
October 23, 2025 at 6:10 PM
This Naashoibito dinosaur community was dominated by the giant sauropod Alamosaurus and crested Lambeosaurine hadrosaurs, which is a marked difference than the coeval Hell Creek Formation.
Reposted by Dan Peppe
Using magnetostratigraphy and Ar/Ar geochronology, we were able to constrain the age of Naashoibito Member deposition, and the major vertebrate fossil localities, to no older than 66.38 Mya.
October 23, 2025 at 6:10 PM
Using magnetostratigraphy and Ar/Ar geochronology, we were able to constrain the age of Naashoibito Member deposition, and the major vertebrate fossil localities, to no older than 66.38 Mya.
Reposted by Dan Peppe
We provide new age constraints on the Naashoibito Member in the San Juan Basin of NW New Mexico showing these rocks, and their unique dinosaurs, are among the last non-avian dinosaurs from the last 340 Kyr of the Cretaceous, contemporaneous with the famous Hell Creek fauna. doi.org/10.1126/scie...
doi.org
October 23, 2025 at 6:10 PM
We provide new age constraints on the Naashoibito Member in the San Juan Basin of NW New Mexico showing these rocks, and their unique dinosaurs, are among the last non-avian dinosaurs from the last 340 Kyr of the Cretaceous, contemporaneous with the famous Hell Creek fauna. doi.org/10.1126/scie...