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 Mesozoic Era includes the Triassic, Jurassic, and Cretaceous Periods and is characterized by the development of flying reptiles, birds, and flowering plants and by the appearance and extinction of dinosaurs. See Table at geologic time.