Rocky Mountain Geosyncline

geological feature, North America

Learn about this topic in these articles:

In Rocky Mountains: Physiography
…structural depression, known as the Rocky Mountain Geosyncline, eventually extended from Alaska to the Gulf of Mexico and became a continuous seaway during the Cretaceous Period (about 145 to 66 million years ago). The ranges of the Canadian and Northern Rockies were created when thick sheets of Paleozoic limestones were…
Read More