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cinder cone

a conical hill formed by the accumulation of volcanic debris around a vent


a very steep, vertical or overhanging face of rock, earth or ice


the land near a shore


one of the 6 or 7 great divisions of land on the globe

continental shelf

a shallow submarine plane of varying width forming a border to a continent and typically ending in a comparatively steep slope to the deep ocean floor


an indefinite usually extended expanse of land


a small sheltered inlet or bay


a steep, rugged rock or cliff


a bowl-shaped depression formed by an impact or around the orifice of a volcano


a natural stream of water normally smaller than an often tributary to a river

cultivated land

to have prepared or prepared and used for the raising of crops


the part of a fluid body moving continuously in a certain direction




a barrier preventing the flow of water or of solid materials (as snow and ice)


a secluded hollow or small valley usually covered with trees or turf


the alluvial deposit at the mouth of a river


arid land with usually sparse vegetation; especially such land having a very warm climate and receiving less than 25 cm of sporadic rainfall annually


a bank usually of earth constructed to control or confine water


a dividing ridge between drainage areas


in the direction of or near to the mouth of a stream

drainage basin

the area from which a single stream or river and its tributaries drains all of the water


a hill or ridge of sand piled up by the wind

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