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AP- Rugged,
well-dissected landscape with dendritic drainage pattern. Elevation- 1000'-3000' with High
Knob rising to over 4000'. |
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RV- Ridge & Valley
subprovince: long linear ridges separated by linear valleys with trellis drainage
pattern. Elevation- 1000'-4500'.
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GV- Great Valley
subprovince: broad valley with low to moderate slopes underlain by carbonate
rocks. Elevation- 500'-1500' north of Roanoke, 1200'-2300' south of Roanoke.
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M- Massanutten Mountain:
Series of long linear ridges that rise to 3000' above the Great Valley. |
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nBR- northern Blue Ridge
subprovince: rugged region with steep slopes narrow ridges, broad mountains, and
high relief. Elevation 1500'-4200'.
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sBR- southern Blue Ridge
subprovince: broad upland plateau with moderate slopes. Elevation 2400'- 3000'
with higher peaks rising above upland, including 5729' Mt. Rogers. |
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F- Foothills subprovince:
region with broad rolling hills and moderate slopes. Elevation 400'-1000' with
peaks rising to 1500'-2500'.
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ML- Mesozoic lowlands
subprovince: region with modest relief and low slopes underlain by Mesozoic
sedimentary and igneous rocks. Elevation 200'-400'.
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OP- Outer Piedmont
subprovince: broad upland with low to moderate slopes. Elevation
600'-1000' in west gradually diminishing to 250'- 300' in east. |
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CU- Upland subprovince:
broad upland with low slopes and gentle drainage divides. Steep slopes develop where
dissected by stream erosion. Elevation- 60'-250'.
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CL- Lowland subprovince:
flat, low-relief region along major rivers and near the Chesapeake Bay. Elevation- 0-60'.
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BM- Barrier Islands &
Salt Marshes: low, open areas covered with sediment and vegetation in direct
proximity to the Chesapeake Bay and Atlantic Ocean. Elevation 0'-15'. |
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