Bog Profile with Layers

[ Bog Profile with Layers, 1. Upper layer 2. Middle layer 3. Bottom layer, Birgitta Wallace, Parks Canada ]

Source: Parks Canada, , , Birgitta Wallace, "Vue des couches d'une tourbière," 1977. Notes: 1. Couche supérieure 2. Couche intermédiaire 3. Couche de fond

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