Which agent of erosion was primarily responsible for forming the long U-shaped valleys in Finger Lakes region New York State?

The long U-shaped valleys in the Finger Lakes region of New York State were primarily formed by glacial erosion. During the last ice age, glaciers moved through the region, scouring out the soft sedimentary rock and creating the deep, narrow valleys that are characteristic of the Finger Lakes. As the glaciers melted, they left behind sediment that filled in the valleys and created the lakes that we see today.