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Diagram showing the change in percentage of tree pollen - South Haven, Michigan
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- Graphic material
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[1948-58] (Creation)
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1 slide : b&w ; 5 X 5 cm
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Diagram of geologic section at South Haven, Michigan showing the change in percentage of tree pollen recovered from various layers. The peat bed has been correlated with the Chippawa low-water stage in the Lake Michigan basin. Other pollen profiles from nearby indicate that the oak peak was reached about 3500 years ago, and since then oak has decreased and white pine has increased. This has been interpreted as a revertence to a colder climate during the last 3500 years (Zumberge 1958, p. 365).
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Photographer: Unknown
Copyright holder: University of Saskatchewan
Copyright expires: 2053
Other terms: Responsibility regarding questions of copyright that may arise in the use of any images is assumed by the researcher.
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- Kupsch, Walter Oscar (Author)