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.y the end of the period 199 million years ago, tectonic forces had slowly begun to split the supercontinent in two: Laurasia in the north and Gondwana in the south.