Name:   MartiniMan - Subject:   Yet more Dementia Joe senility Date:   11/23/2021 5:06:11 PM

You will see transport and deposition of sediment in the streams that feed the lake as well as along the shoreline caused by wave action. It can either be from erosion of the bedrock or the residual soil.  The darker sand has a higher proportion of fine material that is usually silts and clays from the residual soil being eroded and combined with the sand particles. The cleaner looking sands are mostly quartz and feldspar/plagioclase particles and are usually deposited in areas with higher energy that removes the finer, dark particles. May also represent erosion of the bedrock which will be mostly the quartz and plagioclase/feldspar and hence, whiter in appearance.