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This book is the last of three volumes in which the recent knowledge of the extent and chronology of Quaternary glaciations has been compiled on a global scale. This information is seen as a fundamental requirement, not only for the glacial community, but for the wider user-community of general Quaternary workers. In particular the need for accurate ice-front positions is a basic requirement for the rapidly growing field of palaeoclimate modelling. In order to provide the information for the widest-possible range of users in the most accessible form, a series of digital maps was prepared.The glacial limits were mapped in ArcView, the Geographical Information System (GIS) used by the work group. Included with the publication is a CD with digital maps, showing glacial limits, end moraines, ice-dammed lakes, glacier-induced drainage diversions and the locations of key sections through which the glacial limits are defined and dated. Where controversial interpretations are possible, such as for High Asia, they are indicated. All information on Quaternary glaciations worldwide is presented for the first time in a uniform format, including the mountain glaciations of regions such as Costa Rica, Ethiopia or Taiwan. The digital maps in this volume cover Latin America, Asia, Africa, Australasia, Antarctica. Both overview maps and more detailed maps at a scale 1: 1,000,000 are provided.Also available: Part I: Europe, ISBN 0-444-51462-7 Part II: North America, ISBN 0-444-51592-5
Improved dating methods have increased our ability to more precisely determine the timing and durations of glaciations. Utilizing glacial and loess deposits, we have compared glaciations that occurred in North and South America in order to determine if events are synchronous or not, to explore forcing mechanisms, and to compare glaciations with cold periods of the Marine Oxygen Isotope stages and the loess/paleosol records of China. Stratigraphic sections containing a variety of glacial deposits, some with interbedded volcanics, as well as loess deposits, were used in reconstructing the glacial history. The Late Pleistocene (Brunhes Chron) Last Glacial Maximum is recognized in mountain and continental areas of North America but only in the mountains of South America. Commonly our comparisons indicate roughly synchronous glaciations on the two continents, whereas other glaciations are more elusive and difficult to compare. Although our comparisons are at low resolutions, the results suggest that Milankovitch forcing is most likely the dominant trigger for hemispheric glaciation modified by local factors.
Compiled from Dr. Lougees's letters, articles, papers and lectures in support of his theory for glaciation classification.
The fascinating story of how a harsh terrain that resembled modern Antarctica has been transformed gradually into the forests, grasslands, and wetlands we know today.
This book is the second of three volumes in which the recent knowledge of the extent and chronology of Quaternary glaciations has been compiled on a global scale. This information is seen as a fundamental requirement, not only for the glacial community, but for the wider user-community of general Quaternary workers. In particular the need for accurate ice-front positions is a basic requirement for the rapidly growing field of palaeoclimate modelling. In order to provide the information for the widest-possible range of users in the most accessible form, a series of digital maps was prepared.The glacial limits were mapped in ArcView, the Geographical Information System (GIS) used by the work group. Included with the publication is a CD with digital maps, showing glacial limits, end moraines, ice-dammed lakes, glacier-induced drainage diversions and the locations of key sections through which the glacial limits are defined and dated. The last deglaciation is also shown in 500 year time-steps. The digital maps in this volume cover the USA and Canada and include Greenland and Hawaii. Both overview maps and more detailed maps at a scale 1: 1,000,000 are provided.Also available:Part I: Europe, ISBN 0-444-51462-7Part III: South America, Asia, Africa, Australia, Antarctica, ISBN 0-444-51593-3
Between 1978 and 1999, excavations in arctic and western Alaska have revealed the presence of Paleoindians during terminal Pleistocene/early Holocene times, ca. 12,000 to 9500 years BP (Before Present). The Type Site for this cultural manifestation, the Mesa Site, is located on the northern flank of the central Brooks Range at N68° 24.72 W155° 48.02, amid rolling foothills that extend northward 40 miles to the Colville River. The site lies atop a mesa-like ridge that rises 180 feet above the floor of the Iteriak Creek valley, offering an unobstructed 360° view of the surrounding treeless countryside. Excavation at the site has produced the remains of more than 450 formal flaked stone tools and over 120,000 pieces of lithic debitage, which comprise an assemblage typical of the “classic” Paleoindian cultures of the North American High Plains. More than 150 of the artifacts are the complete or fragmentary remains of lanceolate projectile points, many of which have been recovered from within the charcoal/soil matrix of discrete hearths which are the central features of numerous activity areas. The age of the occupation is constrained by 44 uncalibrated AMS radiocarbon dates covering the interval 11,700 to 9700 years BP. The site lacks evidence of any widespread postdepositional disturbance and, except for a small, discrete manifestation in Locality A, contains no remains of more recent cultures. The composition of the Mesa artifact assemblage and its obvious technological relationship with the Paleoindian cultures of mid-continent North America mark it as distinctly different from other ancient arctic cultures. The presence of the Mesa Complex demonstrates a previously undocumented cultural diversity in Eastern Beringia at the Pleistocene/Holocene boundary. This is an interim report. The amount of data generated by the Mesa project is immense. Although we engaged in some analysis and compilation of data as we progressed through the field work, we are not in a position to present this information in its totality. Therefore, limits have necessarily been placed upon the scope of this report so that it can be completed in a reasonable amount of time. While some primary analysis has not been completed, we have enough information to present a report that is more descriptive and introspective than a raw data monograph. In this report, we address the scope of research, order and describe the data analyzed so far, and interpret and summarize the findings to date. This will be accomplished by discussing the following subjects: the culture history of the region and the place of the Mesa Complex within that culture history framework; the natural setting of the site region; the excavation and data collection methods; the description of the site including the natural and cultural stratigraphy, cultural features, localities and activity areas; the flaked stone industry including artifact typology, tool-stone variety, and tool use; the regional Pleistocene faunal assemblage; the regional Pleistocene climate and ecology; and site use.
10 papers using new conceptual frameworks to interpret late Quaternary cultural and environmental remains. Chapters are composed largely of the proceedings of a symposium held at the Society for American Archaeology meetings in 1982.
The evidence for the Little Ice Age, the most important fluctuation in global climate in historical times, is most dramatically represented by the advance of mountain glaciers in the sixteenth and seventeenth centuries and their retreat since about 1850. The effects on the landscape and the daily life of people have been particularly apparent in Norway and the Alps. This major book places an extensive body of material relating to Europe, in the form of documentary evidence of the history of the glaciers, their portrayal in paintings and maps, and measurements made by scientists and others, within a global perspective. It shows that the glacial history of mountain regions all over the world displays a similar pattern of climatic events. Furthermore, fluctuations on a comparable scale have occurred at intervals of a millennium or two throughout the last ten thousand years since the ice caps of North America and northwest Europe melted away. This is the first scholarly work devoted to the Little Ice Age, by an author whose research experience of the subject has been extensive. This book includes large numbers of maps, diagrams and photographs, many not published elsewhere, and very full bibliographies. It is a definitive work on the subject, and an excellent focus for the work of economic and social historians as well as glaciologists, climatologists, geographers, and specialists in mountain environment.