Postglacial history and paleoecology of Wampum, Manitoba, a former lagoon in the Lake Agassiz basin

摘要

A small paleolagoon along the margin of the glacial Lake Agassiz basin near Wampum, Manitoba, 130 km southeast of Winnipeg, contains an unusually thick and continuous sequence of late-glacial and Holocene organic sediment. Cores at 17 sites through this sequence provide insight into the fluctuations of the level of Lake Agassiz, the timing of the construction of the lake's most extensive strandline (the Upper Campbell beach), and the paleoecology of this area during the past 10 000 14C yr. The history of this area is established from 26 new AMS radiocarbon dates, siliceous microfossils, plant macrofossils, mineralogy, sediment characteristics, and stratigraphic relationships.