er63b - Chesapeake-Pamlico Lowlands and Tidal Marshes
er63c - Swamps and Peatlands
er63d - Virginian Barrier Islands and Coastal Marshes
er63e - Mid-Atlantic Flatwoods
er63f - Delmarva Uplands
er64a - Triassic Lowlands
er64b - Trap Rock and Conglomerate Uplands
er64c - Piedmont Uplands
er64d - Piedmont Limestone/Dolomite Lowlands
er65m - Rolling Coastal Plain
er65n - Chesapeake Rolling Coastal Plain
er66a - Northern Igneous Ridges
er66b - Northern Sedimentary and Metasedimentary Ridges
er66c - New River Plateau
er66d - Southern Crystalline Ridges and Mountains
er66e - Southern Sedimentary Ridges
er66e - Limestone Valleys and Coves
er67a - Northern Limestone/Dolomite Valleys
er67a - Northern Shale Valleys
er67c - Northern Sandstone Ridges
er67c - Northern Dissected Ridges and Knobs
er67f - Southern Limestone/Dolomite Valleys and Low Rolling Hills
er67f - Southern Shale Valleys
er67h - Southern Sandstone Ridges
er67h - Southern Dissected Ridges and Knobs
er69c - Greenbriar Karst
er69c - Dissected Appalachian Plateau
er69e - Cumberland Mountain Thrust Block
Based on Ecoregions developed by the EPA this map
describe areas of general similarity in ecosystems and in the type,
quality, and quantity of environmental resources, as well as similarity of
climate that can assist Virginia gardenders.