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Rectangular drainage pattern. Rectangular drainage develops on rocks that are of approximately uniform resistance to erosion, but which have two directions of jointing at approximately right angles or 90 degrees. The joints are usually less resistant to erosion than the bulk rock so erosion tends to preferentially open the joints and streams ...
Headward erosion creates three major kinds of drainage patterns: dendritic patterns, trellis patterns, and rectangular and angular patterns. Dendritic patterns form in homogenous landforms where the underlying bedrock has no structural control over where the water flows. They have a very characteristic pattern of branching at acute angles with ...
Also known as the Rectangular Survey System, it was created by the Land Ordinance of 1785 to survey land ceded to the United States by the Treaty of Paris in 1783, following the end of the American Revolution. Beginning with the Seven Ranges in present-day Ohio, the PLSS has been used as the primary survey method in the United States.
The natural environment of Virginia encompasses the physical geography and biology of the U.S. state of Virginia. Virginia has a total area of 42,774.2 square miles (110,784.67 km 2 ), including 3,180.13 square miles (8,236.5 km 2 ) of water, making it the 35th- largest state by area. [ 1 ]
It includes oceanic sea drainage basins which have hydrologically coherent areas (oceanic seas are set by IHO convention). The oceans drain approximately 83% of the land in the world. The other 17% – an area larger than the basin of the Arctic Ocean – drains to internal endorheic basins.
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The Shenandoah River / ˌ ʃ ɛ n ə n ˈ d oʊ ə / is the principal tributary of the Potomac River, 55.6 miles (89.5 km) long with two forks approximately 100 miles (160 km) long each, [3] in the U.S. states of Virginia and West Virginia.
The Tennessee Valley Divide is the boundary of the drainage basin of the Tennessee River and its tributaries. The Tennessee River drainage basin begins with its tributaries in southwestern Virginia and flows generally west to the confluence of the Tennessee with the Ohio River at Paducah, Kentucky. The Tennessee Valley Divide forms a loop ...
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