Explore Milwaukee County (Click on picture) Milwaukee County, created in 1834 as a territorial county, is derived from a Native American word Mahnawaukee-Seepe meaning gathering place by the river.. Located in southeast Wisconsin, the county seat is Milwaukee.
The Cretaceous-Tertiary extinction event, or the K-T event, is the name given to the die-off of the dinosaurs and other species that took place some 65.5 million years ago. For many years, paleontologists believed this event was caused by climate and geological changes that interrupted the dinosaursâ food supply.
After the Cretaceous-Tertiary extinction event all but a few species of birds became extinct. during the Triassic-Jurassic-Cretaceous.about 245 million years ago to 75 million years ago. the first dinosaurs appeared 225,000,000 years ago, and the last dinosaurs died out 65,000,000 years ago