Keywords: alaska arctic usgs coast coastal ocean permafrost petroleum science outdoor Coastal erosion reveals the extent of ice-rich permafrost underlying active layer on the Arctic Coastal Plain in the Teshekpuk Lake Special Area of the National Petroleum Reserve - Alaska. Credit: Brandt Meixell, USGS Coastal erosion reveals the extent of ice-rich permafrost underlying active layer on the Arctic Coastal Plain in the Teshekpuk Lake Special Area of the National Petroleum Reserve - Alaska. Credit: Brandt Meixell, USGS |