Fossil Sand Wedges at Edmonton, Alberta, Canada
DOI:
https://doi.org/10.26485/BP/1969/19/12Keywords:
sand wedges, paleoclimate, PleistoceneAbstract
Fossil sand wedges beneath till are present in a sand pit at Edmonton, Alberta, Canada. Climatic implications derived from the wedges are: (1) permafrost was present for at least 400 years and possibly 2400 years prior to ice advance; (2) average annual temperature was at least 5°C or 7°C colder than present; (3) precipitation was less than half of the present precipitation of 40 cm/yr.
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