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?
Click here to download. The start of the Triassic period (and the Mesozoic era) was a desolate time in Earth's history. Somethingâa bout of violent volcanic eruptions, climate change, or perhaps a fatal run-in with a comet or asteroidâhad triggered the extinction of more than 90 percent of Earth's species.