Frasnian

The Frasnian is a specific subdivision of the Late Devonian period, occurring roughly 382 to 372 million years ago. It marks a time when diverse marine life, including coral reefs and early fishes, thrived. This period experienced significant geological and environmental changes, such as widespread reef development and some of the earliest known mass extinctions among marine organisms. The Frasnian helps geologists and paleontologists understand the evolution of early life and Earth's history during a critical chapter of the Devonian era.