He notes that there has been more investigation done on a similar site in Lake Huron, here's a research article on that: https://www.pnas.org/content/111/19/69

He notes that there has been more investigation done on a similar site in Lake Huron, here's a research article on that: https://www.pnas.org/content/111/19/6911 https://www.pnas.org/content/111/19/6911