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Triassic Lowlands

Ecoregion in VA, MD, PA, NJ

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The Triassic Lowlands ecoregion is a plain underlain and delineated by sedimentary rock and characterized by wide undulating ridges, broad nearly level valleys, limited local relief, and a mosaic of farms and houses. Typical hilltop elevations generally rise westward from 175 to 600 feet (53-183 m) and local relief is only 30-200 feet (9-61 m). Ecoregion 64a is higher than the Piedmont Limestone/Dolomite Lowlands (64d), but lower than either the Piedmont Uplands (64c) or the Diabase and Conglomerate Uplands (64b); it is not as deeply dissected as Ecoregion 64c. Springs are rather uncommon because the comparatively flat and undissected relief offers little means for the ground water to flow to the surface (Petro and others, 1956).

— EPA

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Ecoregion