gypsum or "mica"

[Koontz John E]

On Wed, 4 Sep 2002, Koontz John E wrote:
> Winnebago    maNaN 'earth, ground, year'

I found the missing Ioway-Otoe form:

maN 'ground, dirt, soil' and also:  'weather'

This may be the missing link.  'Season' and 'year' are a phase and the
cycle of 'weather', which is 'something in the ground' or 'something in
the land'.