Depression

trough basin oceanic trench Danakil Depression loam pit fossa furrow caldera Yellowknife Bay, Mars cirque sinkhole Catalan Central Depression Afar Triangle Catalan Coastal Depression Tuva Depression Kenya Lake System in the Great Rift Valley Weser Depression crater Lower Geyser Basin mare dry lake Sleepy Hollow Drama plain sinkhole Aral–Caspian Depression Sciara del Fuoco Loch Brown Puritan's Pit Paris Basin basin Cologne Lowland Great Lakes Depression