Rapid drop, then rise, in Tahoe lake level + wave action, has generated barrier dunes on beaches. Checked wiki: no one knows how this works.
Replying to @nonsameer
Have no URL for the Tahoe ones; they are only a few months old, and unimpressive. General discussion is at https://en.m.wikipedia.org/wiki/Barrier_island …
10:33 PM - 27 Jul 2016
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