N 42° 55.582'
W 085° 47.998'

This GPS point is indicating a stretch between the north bank of the river and the bank of the island that has multiple examples of trees that have fallen into the river due to undercutting. There are as many as ten trees in this stretch, making it difficult to navigate for larger boats.

When trees become so undercut by the river that they are no longer able to support themselves, they fall into the river. Some trees will stay connected to the bank creating a fallen tree habitat with its own river currents and inhabitants. Other trees will break away from the bank and float downriver. On the Grand River, many of the trees that fall into the river end up in log jams at the heads of islands.

Both of these scenarios play a significant role in river ecology by providing shelter and habitat for many species of animals. The most recognizable inhabitant of these fallen tree habitats will be turtles. Turtles are cold blooded reptiles, so they often like to spend their time lying out in the sun during the day. In a river ecosystem, fallen trees provide them a place to sit that is out of the water, out of the shade of the bank, and in the open sunlight.