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 is divided into three periods: the Triassic Period, the Jurassic Period, , and the Cretaceous Period. The Triassic began around 248 million years ago, after the mass extinction that brought an end to the Permian Period. It lasted about 42 million years.