Text and References to Accompany 'Map Showing the Thickness and Character ofQuaternary Sediments in the Glaciated United States East of the Rocky Mountains

摘要

A 1:1,000,000-scale map of Quaternary deposits has been compiled for theglaciated area of the United States east of the Rocky Mountains. Parts of southern Ontario, areas beneath the Great Lakes, and parts of the submerged eastern seaboard are also included on the map. The map has three components that, together, provide the first regional three-dimensional view of these deposits. These map components are the surface distribution of Quaternary sediments, the total thickness of Quaternary sediments, and the distribution of significant buried Quaternary units. For many areas, this is the first map of the Quaternary sediment thickness published at any scale. The report provides supporting information for the map, preliminary interpretations of sediment distribution, and the list of geologic sources used to generate the map.