Title: Grain Size and Mineralogy of Sediment Cores from Western Lake Huron
Abstract: Grain size and mineralogical analyses along the lengths of 12 cores recovered from the Alpena and Manitoulin Basins, when combined with ages determined by C-14 dating of surficial and basal sediments, reveal an approximate sedimentary history of this part of Lake Huron. Reddish glaciolacustrine clays, essentially all 10 ϕ, crop out on the flanks of the sublacustrine basins and underlie gray post-glacial muds in the central basin regions. The post-glacial muds become more coarse in their upper portions where they are very fine silt. Detrital carbonates which comprise approximately 30% of older sediments are reduced in abundance by an order of magnitude in more recent deposits. We interpet these phenomena as recording lowered lake levels and reduced sedimentation rates since the Nipissing high stand which ended about 4,000 years ago.
Publication Year: 1980
Publication Date: 1980-01-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 18
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