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Cumberland Mountains

Cumberland Mountains
280px
View of Cross Mountain in Tennessee
Highest point
Peak High Knob
Elevation Script error: No such module "convert".
Dimensions
Length Script error: No such module "convert".
Width Script error: No such module "convert".
Geography
Map showing the Cumberland Mountains in orange.
Country United States
States West Virginia, Virginia, Kentucky and Tennessee
Range coordinates

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The Cumberland Mountains are a mountain range in the southeastern section of the Appalachian Mountains. They are located in southern West Virginia, western Virginia, eastern edges of Kentucky, and eastern middle Tennessee, including the Crab Orchard Mountains.[1] Their highest peak, with an elevation of Script error: No such module "convert". above mean sea level, is High Knob, which is located near Norton, Virginia.

According to the USGS, the Cumberland Mountain range is Script error: No such module "convert". long and Script error: No such module "convert". wide, bounded by the Russell Fork on the northeast, the Pound River and Powell River on the southeast, Cove Creek on the southwest, and Tackett Creek, the Cumberland River, Poor Fork Cumberland River, and Elkhorn Creek on the northwest. The crest of the range forms the Kentucky and Virginia boundary from the Tennessee border to Russell Fork River.[1]

Variant names of the Cumberland Mountains include Cumberland Mountain, Cumberland Range, Ouasioto Mountains, Ouasiota Mountains, Laurel Mountain, and Pine Mountain.[1] They are named for Prince William, Duke of Cumberland.[2]

The Cumberland Mountains range includes Pine Mountain (Pine Mountain (Appalachian Mountains)), Cumberland Mountain, Log Mountain, Little Black Mountain and Black (Big Black) Mountain, as well as others.

Geology and physiography

The Cumberland Mountains are a physiographic section of the larger Appalachian Plateau province, which in turn is part of the larger Appalachian physiographic division.[3]

Conservation

Oak Ridge National Laboratory (Oak Ridge, Tennessee) is involved with the conservation of the mixed mesophytic forests within the Northern Cumberland Plateau in Tennessee. The conservation organizations include The Nature Conservancy, the Doris Duke Charitable Foundation, and the Natural Resources Defense Council with focus on the Cumberland Plateau.[4]

Pine Mountain

Pine Mountain is a long, narrow ridge starting in northern Tennessee and extending northeastward into southeastern Kentucky and southwestward Virginia. Its southwestern terminus is near Pioneer, Tennessee and it extends approximately Script error: No such module "convert". to the northeast to near the Breaks Interstate Park in Kentucky and Virginia. More information can be found at Pine Mountain (Appalachian Mountains)

Geology

Pine Mountain is at the headward ramp of the Pine Mountain Thrust Fault. The hard Lee-type sandstones of Early Pennsylvanian Age (Pennsylvanian (geology)) form the ridge line. The sandstone strata crop out here because northwestward movement along the thrust fault caused these sandstones to be pushed up the ramp and to the surface. Because the sandstones are resistant to erosion, they form a prominent ridge along this ramp. The southwestern terminus of Pine Mountain is marked by the northwest-trending Jacksboro Fault, a lateral ramp fault (part of the Pine Mountain Thrust Fault). The northwestern terminus is located near a fault at the Breaks Interstate Park in Kentucky and Virginia.

The northwestern slope of Pine Mountain is cliff-lined (escarpment slope) whereas the southeastern slope is gentle, this is the dip-slope and it is roughly parallel to the dip of the sandstones. This dip is a ramp dip and also the northern limb of the Middlesboro Syncline.

Several gaps occur along Pine Mountain and these are usually caused by erosion along cross-cutting faults. These gaps include the gap at High Cliff, Tennessee (near Jellico), the Narrows gap at Pineville, Kentucky, and Pound Gap near Jenkins, Kentucky. There are other minor gaps as well.

Cumberland Mountain

Cumberland Mountain, not to be confused with the Cumberland Mountains within which it resides, is a long ridge extending from northeastern Tennessee, southeastern Kentucky and southwestern Virginia. Its peak forms the boundary between Kentucky and Virginia in some areas. The southeastern side of Cumberland Mountain is a cliff-lined wall that was a barrier to exploration and settlement in Kentucky during the westward expansion in the late eighteenth century. The famous Cumberland Gap is one of several gaps along Cumberland Mountain that allowed access across the mountain.

Description

Cumberland Mountain is a long ridge running from near Caryville, Tennessee northeastward to near Norton, Virginia, a distance of approximately Script error: No such module "convert".. The southeastern slope of the ridge is cliff lined, whereas the northwestern slope is more gentle. The ridge is interrupted by several gaps, most famous of which is Cumberland Gap, but also includes Big Creek Gap between Ivydell and LaFollette, Tennessee, Pennington Gap near Pennington Gap, Virginia, and Big Stone Gap near Big Stone Gap, Virginia. The crest of Cumberland Mountain ranges from Script error: No such module "convert". to Script error: No such module "convert". feet in elevation.[5] Cumberland Mountain is roughly parallel to Pine Mountain which lies from eight to ten miles to the northwest.

Geology

Cumberland Mountain is part of the Cumberland Overthrust Sheet or block and is the northern limb of the Powell Valley Anticline, a ramp anticline. The ridge exists because hard Lee-type sandstones of Early Pennsylvanian Age (Pennsylvanian (geology)) crop out along this line. Softer rocks have been eroded away, leaving the resistant sandstones to form a ridge. The southwestern terminus of Cumberland Mountain is marked by the northwest-trending Jacksboro Fault, a lateral ramp fault (part of the Pine Mountain Thrust Fault). The northwestern terminus is located near Norton, Virginia where the hard sandstones dip below the surface as the axis of the Powell Valley anticline plunges to the northeast. The various gaps in Cumberland Mountain are caused by rock weaknesses at cross-cutting faults or joints. For example, Cumberland Gap was caused by erosion along the cross-cutting Rocky Face Fault.

The cliff-lined southeastern slope (escarpment slope) of Cumberland Mountain is created by erosion along the breached side of the Powell Valley Anticline. The more-gentle northwestern slope is the dip slope and roughly parallel to the dip of the Early Pennsylvanian sandstones. This northwestward dip is the northern limb of the Powell Valley Anticline.

Cumberland Mountain forms the drainage divide between the Cumberland River to the north and the Powell River (Tennessee River) to the south.

Synclinal Mountains

Several mountains that lie between Pine Mountain and Cumberland Mountain include Black (Big Black) Mountain (Black Mountain (Kentucky)) and Little Black Mountain as well as a number of smaller mountains (Short, Walnut, Rich, Log, Reynolds, etc.). These are all synclinal mountains and reside along the axis of the northeast-trending Middlesboro Syncline. The Pine Mountain ramp forms the northwestern limb of this syncline and Cumberland Mountain (the northwestern limb of the Powell Valley Anticline) forms the southeastern limb.

Further reading

See also

References

  1. ^ a b c U.S. Geological Survey Geographic Names Information System: Cumberland Mountain Range Retrieved on 2010-05-17
  2. ^ "1911 Classic Encyclopedia". Retrieved 5 May 2012. 
  3. ^ "Physiographic divisions of the conterminous U. S.". U.S. Geological Survey. Retrieved 2007-12-06. 
  4. ^ Sustaining the landscape: a method for comparing current and desired future conditions of forest ecosystems in the North Cumberland Plateau and Mountains Retrieved on 2009-04-28
  5. ^ Cumberland Mountains, in Kentucky Encyclopedia (1992), ISBN 0-8131-1772-0, p. 247, The University of Kentucky Press 

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