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To identify, map, and date the landforms making up the valley landscape as well as the deposits below those landforms, in order to provide archaeologists and managers with a physical framework in which the cultural resources of the area can be evaluated.
Iowa has more than eighteen thousand archaeological sites, and research in the past few decades has transformed our knowledge of the state's human past. Drawing on the discoveries of many avocational and professional scientists, Lynn Alex describes Iowa's unique archaeological record as well as the challenges faced by today's researchers, armed with innovative techniques for the discovery and recovery of archaeological remains and increasingly refined frameworks for interpretation. The core of this book--which includes many historic photographs and maps as well as numerous new maps and drawings and a generous selection of color photos--explores in detail what archaeologists have learned from studying the state's material remains and their contexts. Examining the projectile points, potsherds, and patterns that make up the archaeological record, Alex describes the nature of the earliest settlements in Iowa, the development of farming cultures, the role of the environment and environmental change, geomorphology and the burial of sites, interaction among native societies, tribal affiliation of early historic groups, and the arrival and impact of Euro-Americans. In a final chapter, she examines the question of stewardship and the protection of Iowa's many archaeological resources.
Iowa's rock record is the product of more than three billion years of geological processes. The state endured multiple episodes of continental glaciation during the Pleistocene Ice Age, and the last glacier retreated from Iowa a mere (geologically speaking) twelve thousand years ago. Prior to that, dozens of seas came and went, leaving behind limestone beds with rich fossil records. Lush coal swamps, salty lagoons, briny basins, enormous alluvial plains, ancient rifts, and rugged Precambrian mountain belts all left their mark. In "Iowa's Geological Past, " Wayne Anderson gives us an up-to-date and well-informed account of the state's vast geological history from the Precambrian through the end of the Great Ice Age. Anderson takes us on a journey backward into time to explore Iowa's rock-and-sediment record. In the distant past, prehistoric Iowa was covered with shallow seas; coniferous forests flourished in areas beyond the continental glaciers; and a wide variety of animals existed, including mastodon, mammoth, musk ox, giant beaver, camel, and giant sloth. The presence of humans can be traced back to the Paleo-Indian interval, 9,500 to 7,500 years ago. Iowa in Paleozoic time experienced numerous coastal plain and shallow marine environments. Early in the Precambrian, Iowa was part of ancient mountain belts in which granite and other rocks were formed well below the earth's surface. The hills and valleys of the Hawkeye State are not everlasting when viewed from the perspective of geologic time. Overall, Iowa's geologic column records an extraordinary transformation over more than three billion years. Wayne Anderson's profusely illustrated volume provides a comprehensive and accessible survey of the state's remarkable geological past.
The Archaic Period is the longest and one of the most transitional of the cultural periods in North America. Its exact date varied across the continent, but it is distinguished from the earlier Paleo-Indian cultures by new styles of projectile points and other artifacts, and from the later prehistor