A warm climate and high sea level throughout much of the ________ resulted in a shallow seaway in western North America extending from the Arctic south to what is now the Gulf of Mexico.
A) Ordovician
B) Carboniferous
C) Jurassic
D) Cretaceous

Question

Quizplus · Accepted Answer

The warm climate and high sea level described in the question are characteristic of the Cretaceous period, which lasted from approximately 145 to 66 million years ago. During this time, a shallow seaway known as the Western Interior Seaway covered much of western North America, extending from the Arctic in the north to what is now the Gulf of Mexico in the south. The other three choices (Ordovician, Carboniferous, and Jurassic) are all periods that occurred earlier in Earth's history and are not associated with the Western Interior Seaway.

A Warm Climate and High Sea Level Throughout Much of the ________