Fig. 2. Sedimentary structures

Figure 2. The seasonal nature of discharge and sediment transport to Summit Lake means that the annual layers that accumulate in the bottom of the lake can be used to reconstruct past hydrological events. In this figure, the open rectangles are the annual layers - notice the dark thin layer of fine grained material at the top of each annual unit. The yellow arrows point to the early season events caused by nival (snow) and glacial melt. The red arrows point to the late summer/early fall deposits.

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