Canyons, valleys, and rocky landscapes make up most of the Gulf of Maine’s dynamic seafloor. Using bottom sampling, cores and remote-sensing, and geophysical tools, researchers have spent years mapping the benthic region. Amongst the areas dominated by rock, sand, gravel, and muddy basins stretch from Massachusetts to Maine. Some of these muddy areas are charged with natural gas and erupt from time to time. Near the Bay of Fundy strong currents have stripped much of the sediment from the bottom and left a boulder-armored plain. Join Dr. Joe Kelley, a Professor of Marine Geology at the University of Maine, to learn more about underwater landscapes.