‘X’ Marks the Spot: Researchers Monitor Layers of Chautauqua Lake by Julia Preszler on August 3, 2019 share https://www.youtube.com/watch?v=ZX-rYoylvIs&feature=youtu.be As Courtney Wigdahl-Perry controlled the motor on a small inflatable Zodiac on July 22, MaryAnn Mason sat on the edge of the boat and leaned down to read the screen on the depth-finder,