1 Only about 1 percent of Michiganâs maple forest resource is used in maple syrup production. 2  In an average year, each tap-hole will produce about 10 gallons of maple sap, enough for about a quart of pure Michigan maple syrup.
A mass extinction marked the end of the Mesozoic Era The Mesozoic era is the era of dinosaurs and lasted 180 million years. This era includes 3 well-known periods - Triassic, Jurassic, Cretaceous. A mass extinction marked the beginning and the end of the Mesozoic Era. Was this helpful?
The Cretaceous Period is the final period of the Mesozoic Era. It covered the time span of 144 million years ago to 65 million years ago. There was a minor mass extinction at the end of the Jurassic Period that is the sign of the beginning of the Cretaceous.