The Jurassic shallow water fauna in Eurasia and Tethys is similar to fauna from western coast of North America. The migration is explained by two concepts:
Spanish Corridor – narrow seaway connecting Europe and western coast of North America
Panthalassa steppingstones – terranes located between eastern Asia and western coast of North America
As far as I remember, there is no actual geological/paleontological evidence for the Hispanic corridor - it's just based on faunal similarity. And as Sylvain wrote, there is exchange across the present-day Pacific Ocean, so why not across Panthalassa back in the Jurassic?
Cheers, Steffen
The problem with the question is that there are more than two possibilities but we have to choose one out of two
Quite speculative ideas about steppingstones
https://www.researchgate.net/publication/223779606_Late_Triassic_and_Early_Jurassic_palaeogeography_of_the_world
https://www.researchgate.net/publication/321135815_Late_Triassic_Global_Plate_Tectonics/stats
- Badges
- Science method
- Similar topics
- Biological Science
- Ecology