Cambrian-Ordovician boundary

The Cambrian-Ordovician boundary marks a major point in Earth's history about 485 million years ago, transitioning from the Cambrian Period to the Ordovician Period. It signifies changes in the types of rocks found and shifts in the types of fossils, reflecting significant biological and environmental transformations. This boundary is important because it marks the end of a time of rapid evolutionary diversification, called the Cambrian Explosion, and the beginning of new ecological developments. Studying this boundary helps scientists understand early animal evolution, Earth’s climate changes, and how life adapted to new conditions during that era.