exit78:
A 'black roller' moves across the plains carrying soil blown from unprotected farmland during the Dust Bowl NRCSDC01019
exit78:
Dust storm over the Lincoln Memorial in March, 1935. USDA Soil Conservation Service NRCSDC13022
exit78:
A 'black roller' moves across the plains carrying soil blown from unprotected farmland during the Dust Bowl NRCSDC01006