ALGONQUIN -- FLOOD
One day, the god Michabo was out hunting with his pack of wolves, when he noticed that his wolves went into the lake and didn't come back out. He went in to fetch them out, and the world flooded as he did so. Michabo sent a raven looking for soil to make a new earth from, but the bird couldn't find any, and an otter sent out on the same quest produced no results either.
Michabo then sent a muskrat and she came back with enough soil to create a new earth. Michabo was pleased, and the two married and became the parents of humans.