What does the geologic time scale confirm about the Cretaceous period? It ended during the Cenozoic era. It ended during the Mesozoic era. It started before Precambrian time.

The Cretaceous period, a fascinating time in Earth's history, spanned from about 145 to 66 million years ago and is famous for being the last of the three periods within the Mesozoic era, often called the "Age of Dinosaurs." It witnessed the flourishing of dinosaurs alongside the appearance of flowering plants and many new marine species, setting the stage for dramatic evolutionary changes that would follow. When the Cretaceous period came to a climactic end, it marked one of the most significant mass extinctions in history, famously wiping out approximately 75% of all species, including the dinosaurs. This extinction event paved the way for the rise of mammals and eventually the dominance of birds, leading into the diverse ecosystems we see today in the Cenozoic era. Talk about a dramatic shift in the storyline of life on Earth!