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Step 1Here's a comprehensive summary of the Cretaceous period:
Step 2: Time Period and Duration
The Cretaceous period was the final and longest segment of the Mesozoic Era, spanning approximately 79 million years from about 145 to 66 million years ago. It is named after the Latin word "creta", meaning chalk, due to the extensive chalk deposits formed during this time.
Final Answer
The Cretaceous was a transformative period marked by significant biological diversification, geological changes, and ultimately, a catastrophic mass extinction that reshaped life on Earth.
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