Continental Dived the line of summits of the Rocky Mountains, separating streams flowing toward the Gulf of California and the Pacific from those flowing toward the Gulf of Mexico, Hudson Bay, and the Arctic Ocean.
Glacier an extended mass of ice formed from snow falling and accumulating over the years and moving very slowly, either descending from high mountains, as in valley glaciers, or moving outward from centers of accumulation, as in continental glaciers.
Mesa a land formation, less extensive than a plateau, having steep walls and a relatively flat top and common in arid and semiarid parts of the southwestern U.S. and Mexico.
Strait a strait lies between two land masses and connects two larger bodies of water, an isthmus lies between two bodies of water and connects two larger land masses.