Pennsylvanian (Noun)
Meaning 2
From 310 million to 280 million years ago; warm climate; swampy land.
Classification
Nouns denoting time and temporal relations.
Examples
- The Pennsylvanian period was marked by a relatively warm climate, with little to no polar ice, resulting in sea levels being much higher than today.
- During the Pennsylvanian, vast swaths of land were covered in swampy forests, which would eventually become the coal deposits of modern-day Eastern North America.
- Fossil evidence suggests that amphibians largely replaced fish as the dominant aquatic animals during the Pennsylvanian period.
- The Pennsylvanian saw a rapid increase in the evolution of insects, with beetles, dragonflies, and cockroaches becoming more diverse and widespread.
- One of the defining characteristics of the Pennsylvanian landscape was the extensive network of rivers and streams that flowed through the swampy lowlands.