D. a sand dune. B. increased sulfate aerosols in the atmosphere. C. increased volcanic ash in the atmosphere. D. increased carbon dioxide in the atmosphere. Glaciers form only near the poles.
Glaciers are very efficient at transporting materials, so glacial till is typically well sorted.
To learn about plate tectonics. To learn about prehistoric lifeforms. To learn about prehistoric climate. To learn about the isotopes of oxygen. Both A and C 12.