Geology and Soils
Bedrock around the southern two-thirds of the lake is meta-igneous rock of Lower Paleozoic age which is rich in mafic minerals except along southeastern shores where felsic minerals dominate. Bands of marble up to several meters thick are scattered within this metamorphic complex. Around northern shores are volcanic rocks of variable composition from the Jurassic period.
Soils around the lake are mostly well drained or rapidly drained gravelly sandy loams or gravelly loamy sands with brown podzolic profile development. Some meet the definition of podzols under the current Canadian system of soil classification. A small area of peat lies near the southern end of the community of Shawnigan Lake.
Read more about this topic: Shawnigan Lake
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