Presentation on theme: "Physiographic Provinces of Virginia"— Presentation transcript:
1Physiographic Provinces of Virginia Earth ScienceDeborah Bowyer, ITRT
25Virginia is divided into ____ major physiographic provinces (physio-physical features, graphic—map of).Coastal PlainValley & RidgeAppalachian PlateauEWBlue RidgePiedmont
3The Coastal Plain A gently seaward sloping surface in Eastern Virginia Pile“_______” of loose sediments that have eroded from the mountains.0’ sea levelSedimentsThe highest elevation is about 300 ft. above sea level.
4Ages of rocks: Fossils: Sedimentary, loose sediment Kinds of rocks:Ages of rocks:Fossils:Sedimentary, loose sediment0-225 mya (millions of years ago)Sea critters
5This area is rich in _____ and ______ resources. gravel sandThis area is rich in _____ and ______ resources.gravelFall line:b. Major cities are located here.a. Waterfalls and rapids are located here.
6The Piedmont A gently rolling area with hills and valleys (pied-foot, mont-mountains). This is located in Central Virginia.EBlue RidgeCoastal PlainPiedmontW
7subductionAn episode of ___________ that occurred before the formation of the Appalachian Mountains created these rocks. They are part of the ______ of the mountains.roots
8Ages of rocks: Fossils: Igneous and metamorphic (some sediment) Kinds of rocks:Ages of rocks:Fossils:Igneous and metamorphic (some sediment)myaNoneException: Culpepper Co. Dinosaur tracks
9Blue Ridge Highest older eroded A narrow line of mountains north of Roanoke, a broader, upland surface south of Roanoke. _________ mountains in Virginia. The Appalachian mountains are ________ and more _________ than the Rocky Mountains.Highestoldereroded
10Mount Rogers Elevation: 5719’ W Highest peak __________________ in Virginia.
11Kinds of rocks: Ages of rocks: Fossils: oldest Igneous & metamorphic 245 mya-1 byaNoneMetamorphosis____________ occurred during the Appalachian Mountain formation. These are the ________ rocks in Virginia.oldest
12Valley and Ridge An area of long, parallel ridges separated by valleys WRidgesValleysGreat ValleyBlue RidgePlateauThrust FaultsAlleghany County
13Sections of hard, resistant rocks make up the ridges, while soft, eroded limestone makes up the valleys. ________ has eroded and leaves caves and caverns (karst topography).Limestone
14Folding and faulting occurred during the formation of the Appalachian Mountains (when N. America collided with Africa and Europe). This occurred during the Paleozoic Era ( million years ago).
15Kinds of rocks: Ages of rocks: Fossils: Sediment 350-570 mya Sea critters
16Appalachian Plateau This is a series of plateaus separated by faults Appalachian Plateau This is a series of plateaus separated by faults. “The Boot”This area is known for rich deposits of ____, ____, and _________.coaloilnatural gasCoal seams
17Kinds of rocks: Ages of rocks: Fossils: Sediment 286-360 mya Scale trees Ferns Some sea critters
18W E Appalachian Plateau “Rolling Hills” Plateaus Valley & Ridge Faults Alleghany County