Layers of Snow: An Archeologist's Quandary

We have had eight snowstorms: from major blizzard to light dusting. If you take a snow shovel and sample a slice of the landscape, different layers from the various ice- and snowstorms can be seen.

It looks like this:
(Instructions: Read diagram from bottom to top.)





This morning's snowshower:  --------------------------------------------------------------------------------------






Next snowstorm: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Just a dusting:  .. . .      ....       . . . . .    . . . .....       . . . . .   .          ...    .          .          .


Light snow: -----------------------------------------------------------------------------------------------------------

Major blizzard:  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Third snowstorm: --------------------------------------------------------------------------------------------------

Second snowstorm: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

First snowstorm of the season: **  * *   * *      *   * *   * * *          **      *     *              ** *    ***  * *