Before the arrival of Europeans, “log jams” formed by the accumulation of fallen trees and driftwood on rivers and streams were a common phenomenon across North America.
The most famous, and largest, was the Red River. At its peak, this log jam — known as the Great Raft — extended between 130 and 160 miles, clogging the lower part of the river in what is now Northwest Louisiana and Northeast Texas. It formed sometime around 1000 CE. Its great size made it a natural dam,forcing water over the banks of the Red River and into the valley, creating numerous large and deep lakes. A few even remain today, two centuries after European steam boats removed the Great Raft to allow boats to navigate the river.
Nenhum comentário:
Postar um comentário