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.
Dinosaurs first appeared during the Triassic period, around 280 MYA (Million Years Ago), and died out around 65.5 MYA. They evolved from Archosaurs, or Ruling Reptiles. It â¦ is still unknown why they died out.he dinosaurs died 65 million years ago, in the cretaceous period ,during the mesozoic era.