12 Questions
What type of reptiles does the term 'archosaur' refer to?
Dinosaurs, flying reptiles, crocodiles, and birds
Which type of mammals lay eggs instead of giving birth to live young?
Monotreme mammals
What is the characteristic feature of Ornithischia, one of the dinosaur orders?
Birdlike pelvis
Which vertebrate animals are considered ectotherms?
Amphibians and reptiles
What is the term for walking on two legs as a means of locomotion?
Bipedal
Which period comes last in the correct order and timeline of the Mesozoic era?
Cretaceous
During which time period did the Sonoma orogeny occur?
Permian-Triassic
Which phase of the Cordilleran orogeny affected the western part of the Cordilleran mobile belt?
Nevadan orogeny
What is the main characteristic of terranes?
They consist of seamounts and oceanic rises
Which event effectively divided North America into two large landmasses?
Cretaceous Interior Seaway
What distinguishes terranes from surrounding rocks?
Seafloor origin
Which geological event was responsible for many structural features of the present-day Rocky Mountains?
Sevier orogeny
Test your knowledge on geologic events and features such as Cordilleran orogeny, Cretaceous Interior Seaway, and Laramide orogeny. Learn about the deformation episodes that shaped the western margin of North America and the Late Cretaceous arm of the sea that divided the continent.
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