Analysis of pollen and plant macrofossils from sediment cores indicate complex changes in the vegetation succession from deglaciation about 13,000 years ago to the present.

Main source for USDA's farm and food price forecasts; short-term outlook for all major areas of the agricultural economy; long-term issue analyses of US agricultural policy, trade forecasts, export-market development, food safety, the environment, farm financial institutions. Includes data on individual commodities, the general economy, US farm trade, farm income, production expenses, input use, prices received and paid, per capita food consumption,...

Carboniferous Foraminifera and Algae of the Amsden Formation (Mississippian and Pennsylvanian) of Wyoming: Descriptions and illustrations of foraminifers and algae. Coelenterata of the Amsden Formation (Mississippian and Pennsylvanian) of Wyoming: Descriptions and illustrations of 11 taxa of corals and 3 of hydrozoans. Brachiopoda of the Amsden Formation (Mississippian and Pennsylvanian) of Wyoming: Descriptions and illustrations of 66 species and...