I’m working to get a better handle on the scenes I see from the air. As I research the rivers and their contribution to human habitation, I’ve also relearned how recently the glaciers have disappeared and the first humans arrived. We are speaking of only 15,000 to 13,000 years ago. What did the landscape look like then?
Perhaps it had a similar appearance to the upper elevations of today’s Katahdin. Once the glaciers melted away, treeless tundra and plains were left behind. Maybe it looked something like this.
It seems the first humans arrived on foot, hunting game which included the Wooly Mammoth and Mastodons. Sea levels rose and fell and the forest crept in. As of approximately 9000 years ago, the tundra and plains had given way to tree and forests, impeding the easy movement by foot. Access and life along the rivers became essential.