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3.2.4.3 Varved Clay Deposits

At a distance from the glacier, clay and silt make up a large portion of the stream load so that some of the filled-lake deposits may consist of alternating dark and light layers called varved clays. Each pair (light and dark) consists of a layer of predominantly fine silt or sand overlain by a darker clay rich layer. The silt and sand may be due to summer deposition while the clay is due to winter deposition.


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Varved Clay
Varved Clay
Original drawing by B.Z. Saylor
Massachusetts Institute of Technology
Varved Clay   

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