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Full-Text Articles in Social and Behavioral Sciences
Late Glacial Landscape Ecology In Central North America, Christopher L. Hill
Late Glacial Landscape Ecology In Central North America, Christopher L. Hill
Christopher L. Hill
The transition from full glacial to interglacial conditions along the southern margin of the Laurentide ice sheet resulted in dramatic changes in landscapes and biotic habitats. Strata and landforms resulting from the Wisconsin Episode of glaciation in the area directly west of Lake Superior indicate a context for late Pleistocene biota (including human populations) connected to ice margins, proglacial lakes, and postglacial drainage systems. Late Glacial landscape features that have the potential for revealing the presence of Paleoindian artifacts include abandoned shorelines of proglacial lakes in the Superior and Agassiz basins and interior drainages on deglaciated terrains. The linkage between …
Identification Of Immunoreactive Material In Mammoth Fossils, Mary Higby Schweitzer, Christopher L. Hill, John M. Asara, William S. Lane, Seth H. Pincus
Identification Of Immunoreactive Material In Mammoth Fossils, Mary Higby Schweitzer, Christopher L. Hill, John M. Asara, William S. Lane, Seth H. Pincus
Christopher L. Hill
The fossil record represents a history of life on this planet. Attempts to obtain molecular information from this record by analysis of nucleic acids found within fossils of extreme age have been unsuccessful or called into question. However, previous studies have demonstrated the long-term persistence of peptides within fossils and have used antibodies to extant proteins to demonstrate antigenic material. In this study we address two questions: Do immunogenic/antigenic materials persist in fossils? and; Can fossil material be used to raise antibodies that will cross-react with extant proteins? We have used material extracted from a well-preserved 100,000-300,000-year-old mammoth skull to …
Alluvial Stratigraphy And Geoarchaeology In The Big Fork River Valley, Minnesota: Human Response To Late Holocene Environmental Change, Christopher Hill, George (Rip) Rapp, Zhichun Jing
Alluvial Stratigraphy And Geoarchaeology In The Big Fork River Valley, Minnesota: Human Response To Late Holocene Environmental Change, Christopher Hill, George (Rip) Rapp, Zhichun Jing
Christopher L. Hill
The Late Quaternary geomorphology and stratigraphy of the Big Fork River valley, within the Rainy River basin of northern Minnesota, reveals evidence of prehistoric human interaction with late Holocene riverine environments. By 11000 14C B.P., deglaciation made the region inhabitable by human groups using Clovis artifacts. Human habitation would also have been possible during the Moorhead low water stage of glacial Lake Agassiz, starting at 10500 14C B.P. Near its confluence with the Rainy River, the valley floor of the Big Fork valley consists of a floodplain complex and two terraces. The multi-component stratified Hannaford site is situated …