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→Five Geological Regions of Virginia
==Five Geological Regions of Virginia==
==Five Geological Regions of Virginia==
Virginia is commonly divided into five geological regions, Tidewater, Piedmont, Blue Ridge, Valley and Ridge and the Applachia Plateau. There are no formal lines demarking these regions and any political boundaries, such as county or city boundaries are coincidental. However, these regions have identifiable geology which differentiates them.
Virginia is commonly divided into five geological regions, Tidewater, Piedmont, Blue Ridge, Valley and Ridge and the Applachia Plateau. There are no formal lines demarking these regions and any political boundaries, such as county or city boundaries are coincidental. However, these regions have identifiable geology which differentiates them.
===Fall Line===
The ''Fall Line'' is so named because it demarks a line where many waterfalls occur in Virginia Rivers. Below the Fall Line most rivers, such as the James and Potomac and Rappahannok, are broad, deep and gentle, but above the Fall Line the rivers are rockier and swifter. Below the Fall Line rivers are navigable by ocean-going vessels. Above the Fall Line canoes and flat boats are the only means to navigate most rivers.
Because of this the C&O Canal (Chesapeake and Ohio Canal) was constructed above the Fall Line. The goal was to unite the Chesapeake Bay with the Ohio River system the way the Erie Canal had opened up the Great Lakes below Niagara. Many important Virginia cities such as Alexandria, Richmond and Petersburg are just below the Fall Line.
===Tidewater===
===Tidewater===