Contact: Andrea Gibson
Caption: This slab of rock contains fossils of invasive species that populated the continent of Laurentia 450 million years ago after a major ecological shift occurred. Ohio University geologists found that rising mountains and cooling oceans prompted the spread of these invasive species.
Credit: Alycia Stigall
Usage Restrictions: Please credit Alycia Stigall.
Related news release: Rising mountains, cooling oceans prompted spread of invasive species 450 million years ago