What does varve analysis dating mean
These formed as the result of large volcanic explosions.
This image is a web site that documents the research on the varves from this location: Why is Lake Suigetsu a good place to examine varves?
This lake has all the features that one could hope to find in a location to avoid those problems.
Annual varves are the product of changes in the composition of sediments and organic material deposited in spring and summer vs the fall and winter.
In the summer, pollen, algae (especially diatoms, see: Life in a Glass House: Diatoms Shatter Young Earth Flood Geology) – fall to the lake bottom.