Attributes for MRB_E2RF1 Catchments by Major River Basins in the Conterminous United States: Level 3 Ecoregions
This tabular data set represents the estimated area of level 3 ecological landscape regions (ecoregions), 
as defined by Omernik (1987), compiled for every MRB_E2RF1 catchment of the Major River Basins 
(MRBs, Crawford and others, 2006). The source data set is Level III Ecoregions of the Continental 
United States …