Pennsylvanian

The Pennsylvanian is a geological period that occurred roughly 323 to 298 million years ago, part of the Carboniferous era. It's known for extensive forests of giant ferns and seed ferns, which eventually formed much of the world's coal deposits. During this time, Earth's climate was warm and humid, promoting lush plant life and the development of diverse ecosystems. The Pennsylvanian also saw the rise of early amphibians and insects, and significant continental shifts that influenced ocean and land formations. It played a key role in Earth's geological and biological history, especially in coal formation and early terrestrial ecosystems.