This volume reviews the status of investigations aimed at deciphering the geologic, biogeographic, and archaeological records of the Quaternary Era (the last million years of geologic time) for the area of continental United States. Over 80 Quaternary scientist, from many diverse disciplines, have contributed to the 55 chapters organized under each area east of the Rocky Mountains, unglaciated eastern and central United States, western United States); Biogeography (phytogeography and palynology, zoogeography and evolution); Archaeology; and Miscellany (oceanography, isotope dating and geochemistry, paleopedology, paleolimnology, paleopedology, paleolimnology, paleohydology, glaciology, vulcanology, paleomagnetism, neotectonics, dendrochonology, and theoretica climatology. The book contains more than 300 illustrations.