The Layer-Making Sedimentation Experiments of Guy Berthault
Berthault describes his layer-making experiments in overview (9 k) and detail (11 k), and Brad Henke (17 k) explains why geologists already knew about this kind of layer-making, which does not explain the actual historical formation of varves because the experimental conditions and real-world conditions are different; this is followed by responses from Berthault (10 k) and Henke (46 k).
There is also a page, based mainly on a personal story, by Don Batten (5 k).
And in the homepage for Age-Science you can LEARN MORE ABOUT VARVES.