Bison remains from a Lake Agassiz spit complex in the Swan River valley, Manitoba: depositional environment and paleoecological implications

1984 ◽  
Vol 21 (7) ◽  
pp. 829-842 ◽  
Author(s):  
Erik Nielsen ◽  
Eugene M. Gryba ◽  
Michael C. Wilson
Keyword(s):  
Depositional Environment ◽  
River Valley ◽  
Early Holocene ◽  
Lake Agassiz ◽  
Radiocarbon Dates ◽  
Geological Significance ◽  
Short Time ◽  
Swan River

Fossil bison remains have been recovered from gravels on an extensive spit complex situated between the Upper and Lower Campbell levels of Lake Agassiz in Swan River valley, western Manitoba. Three bone samples yielded radiocarbon dates of 10 300 ± 200 years BP (BGS-617), 9500 ± 150 years BP (BGS-840), and 9400 ± 125 years BP (BGS-887). These are the first dates obtained outside the southern basins of Lake Agassiz for the beginning of the Campbell phase.Local geomorphological evidence and the radiocarbon dates indicate that both Campbell beaches formed within a relatively short time during the Campbell phase. Aside from their geological significance, the bison remains and their depositional context are important for interpreting early Holocene ecology and Paleo-Indian occupation of the Swan River valley.

THE LAST HUNTER-GATHERERS AND EARLY FARMERS OF THE MIDDLE SOUTHERN BUH RIVER VALLEY (CENTRAL UKRAINE) IN VIII–V MILL. BC

Radiocarbon ◽  
2020 ◽  
pp. 1-17
Author(s):  
Dmytro Kiosak ◽  
Nadiia Kotova ◽  
Willy Tinner ◽  
Soenke Szidat ◽  
Ebbe H Nielsen ◽  
...  
Keyword(s):  
River Valley ◽  
Early Holocene ◽  
Human Settlement ◽  
Hunter Gatherers ◽  
Radiocarbon Dates ◽  
Ceramic Bearing ◽  
Early Farmers ◽  
Late Mesolithic

ABSTRACT A new series of 19 radiocarbon dates provides new insights on the human settlement activity in central Ukraine. The paper presents data from the Early Holocene until the establishment of Trypillian mega-sites in the late Vth mill. BC. Our new dates from a long sequence of the site of Melnychna Krucha refine the chronology of the Middle and Late Mesolithic and local ceramic-bearing “Buh-Dniester” culture. Additional dates were obtained on bones from Linear Pottery culture sites and Trypillian sites of stages A3 and B1.

scholarly journals Resultantes geo-hidroecológicas do ciclo cafeeiro (1780-1880) no médio vale do rio Paraíba do Sul: uma análise quali-quantitativa

1996 ◽  
Vol 19 ◽  
pp. 61-78
Author(s):  
Marcelo Eduardo Dantas ◽  
Ana Luiza Coelho Netto
Keyword(s):  
Environmental Impact ◽  
Economic Activity ◽  
Source Area ◽  
River Valley ◽  
Historical Documents ◽  
Sedimentation Rates ◽  
Economic Cycle ◽  
Drought Period ◽  
Radiocarbon Dates ◽  
Valley Fills

The coffee cycle represented a period of intense morphodynamic activity, proceeding by a general deforestation. On the Paraíba do Sul Middle Valley, this economic cycle lasted 100 years aproximately (1780-1880). Historical documents, radiocarbon dates and volumetric measurements of the valley fills correlated from the coffee time, have provided informations on the environmental impact, particularly associated with climatic and hidro-erosive processes both on the hillslopes and fluvial domains. Deforestation introduced a drought period up to 6 months and also to an increasing frequency of intense rainstorms, particularly in the summer. Along the Piracema river valley, sedimentation rates attained about 70.000m³km/year. Transfering this volume to the source-area on the hillslopes, it gives an estimate relief downwearing around 7,5 cm depth, resulting on the removal of the organic rich A horizon and showing so, the catastrophic effect of this economic activity, resulting in an extremely wasted degraded landscape.

Holocene evolution of the Assiniboine River paleochannels and Portage la Prairie alluvial fan

1989 ◽  
Vol 26 (9) ◽  
pp. 1834-1841 ◽  
Author(s):  
W. F. Rannie ◽  
L. H. Thorleifson ◽  
J. T. Teller
Keyword(s):  
Alluvial Fan ◽  
Red River ◽  
Lake Agassiz ◽  
Radiocarbon Dates ◽  
The Holocene ◽  
Sediment Loads ◽  
History Of ◽  
Western Side

The Portage la Prairie alluvial fan was constructed by numerous successive paleochannels of the Assiniboine River along the western side of the Lake Agassiz basin as the level of the lake rapidly declined beginning 9500 years ago. The history of the paleochannels during the first several thousand years is not known. Paleochannel morphologies and cross-cutting relations, soil maturity, and radiocarbon dates, however, indicate that by 6000–7000 years ago flow was northward into Lake Manitoba. This direction was maintained until about 3000 years ago, when avulsion redirected the Assiniboine eastward to the Red River near Winnipeg. The morphologies of the paleochannels suggest that channel-forming discharges and sediment loads of the ancestral rivers have not differed significantly from the modern values despite palynological evidence that the climate was warmer and drier during much of the Holocene.

New excavations at the late Pleistocene site of Chinchihuapi I, Chile

2019 ◽  
Vol 92 (1) ◽  
pp. 70-80 ◽  
Author(s):  
Tom D. Dillehay ◽  
Carlos Ocampo ◽  
Jose Saavedra ◽  
Mario Pino ◽  
Linda Scott-Cummings ◽  
...  
Keyword(s):  
Late Pleistocene ◽  
Early Holocene ◽  
Occupied Site ◽  
Radiocarbon Dates ◽  
Central Chile ◽  
South Central ◽  
Cool Temperate ◽  
Human Use ◽  
Monte Verde ◽  
Point Type

AbstractThis paper presents new excavation data on the Chinchihuapi I (CH-I) locality within the Monte Verde site complex, located along Chinchihuapi Creek in the cool, temperate Valdivian rain forest of south-central Chile. The 2017 and 2018 archaeological excavations carried out in this open-air locality reveal further that CH-I is an intermittently occupied site dating from the Early Holocene (~10,000 cal yr BP) to the late Pleistocene (at least ~14,500 cal yr BP) and probably earlier. A new series of radiocarbon dates refines the chronology of human use of the site during this period. In this paper, we describe the archaeological and stratigraphic contexts of the recent excavations and analyze the recovered artifact assemblages. A fragmented Monte Verde II point type on an exotic quartz newly recovered from excavations at CH-I indicates that this biface design existed in at least two areas of the wider site complex ~14,500 cal yr BP. In addition, associated with the early Holocene component at CH-I are later Paijan-like points recovered with lithic tools and debris and other materials. We discuss the geographic distribution of diagnostic artifacts from the site and their probable relationship to other early sites in South America.

scholarly journals Groningen Radiocarbon Dates V

Radiocarbon ◽  
1964 ◽  
Vol 6 ◽  
pp. 349-369 ◽  
Author(s):  
J. C. Vogel ◽  
H. T. Waterbolk
Keyword(s):  
Similar Form ◽  
Radiocarbon Dates ◽  
Geological Significance

This date list mainly contains results obtained for archaeological samples which were measured in the Groningen laboratory in the course of the years and which have not hitherto been published in a similar form. As such it is an extension of the previous date list (Groningen IV) and reference is made to this publication for information on the method of presentation, the corrections applied, etc. Samples which are primarily of geological significance will be presented separately in next year's list.

Pressure Knapping and the Timing of Innovation: New Chrono-Cultural Data on Prehistoric Groups of the Early Holocene in the Maghreb, Northwest Africa

Radiocarbon ◽  
2020 ◽  
Vol 62 (2) ◽  
pp. e1-e51 ◽  
Author(s):  
Thomas Perrin ◽  
Tiphaine Dachy ◽  
Colas Guéret ◽  
David Lubell ◽  
Yasmina Chaïd-Saoudi ◽  
...  
Keyword(s):  
North Africa ◽  
Western Europe ◽  
Western Mediterranean ◽  
Early Holocene ◽  
Radiocarbon Dates ◽  
Northwest Africa ◽  
Lithic Industry ◽  
Eastern Algeria ◽  
Cultural Entities ◽  
Cultural Data

ABSTRACTThe early Holocene in North Africa remains a poorly known period, documented unequally by region. Eastern Algeria and Tunisia have the greatest number of deposits, but most were excavated decades ago without the controls and recording required for modern interpretation. The chronological framework is based on radiocarbon (14C) dates that are also old, for the most part. Recent work on Mesolithic lithic industries of Western Europe has enabled us to revive the hypothesis of the existence of contacts between the northern and southern shores of the western Mediterranean at least by the 6th millennium cal BC. A collective research program was conducted in 2016–2017 to test this hypothesis with a particular focus on documenting the technological traditions in the lithic industry and situating them precisely in time. We have 46 new radiocarbon dates that were recently carried out on previously excavated Algerian sites, some of which contain several levels, allowing the construction of Bayesian models. These new measures reinforce the hypothesis of contacts between Europe and Africa by demonstrating the contemporaneity of similar technological processes. Above all, they make it possible to accurately refine the chronology of the main cultural entities of the Maghreb at the beginning of the Holocene.

scholarly journals Illinois State Geological Survey Radiocarbon Dates X

Radiocarbon ◽  
1992 ◽  
Vol 34 (1) ◽  
pp. 83-104 ◽  
Author(s):  
Chao-Li Liu ◽  
D. L. Asch ◽  
B. W. Fisher ◽  
D. D. Coleman
Keyword(s):  
Radiocarbon Dating ◽  
Geological Survey ◽  
Radiocarbon Dates ◽  
Cultural Contexts ◽  
Geological Significance ◽  
West Central ◽  
Northwestern University ◽  
Partial List ◽  
University Department ◽  
Central Illinois

The following is a partial list of samples of archaeological interest processed between February 1981 and October 1985 at the Illinois State Geological Survey (ISGS) Radiocarbon Dating Laboratory. The list contains samples from west-central Illinois that were related to projects conducted by current or former researchers at the Center for American Archeology (CAA) (formerly Foundation for Illinois Archaeology) and Northwestern University, Department of Anthropology, or, as noted, by colleagues from other institutions. Although some of the samples reported here came from non-cultural contexts and are primarily of geological significance, all were from or related to archaeological investigations.

The age of the Hartman moraine and the Campbell beach of Lake Agassiz in northwestern Ontario

1982 ◽  
Vol 19 (10) ◽  
pp. 1933-1937 ◽  
Author(s):  
Erik Nielsen ◽  
W. Brian McKillop ◽  
James P. McCoy
Keyword(s):  
Water Level ◽  
Hard Water ◽  
High Water ◽  
Water Effect ◽  
Lake Agassiz ◽  
Red Clay ◽  
Radiocarbon Dates ◽  
Freshwater Molluscs ◽  
Northwestern Ontario ◽  
Freshwater Mollusc

Fluctuations in the level of Lake Agassiz are dated at two sites in northwestern Ontario. A radiocarbon date on a modern shell sample indicates dates on freshwater molluscs from the area are about 440 ± 100 years (GSC-3281) too old due to the hard-water effect. An adjustment of 400 years to two fossil freshwater mollusc dates of 11 400 ± 410 (GSC-3114) and 10 400 ± 100 years BP (GSC-2968) makes them compatible with radiocarbon dates on wood from deposits in other parts of the Lake Agassiz basin. The two new dates indicate the beginning of the low-water Moorhead Phase of Lake Agassiz started about 11 000 years BP. The high-water Emerson Phase started when the water level rose to form the Upper Campbell beach approximately 10 000 years BP. The red clay widely distributed throughout northwestern Ontario was deposited during the Emerson Phase when the ice margin lay along the Hartman, Dog Lake, and Marks moraines.

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