Hi Martin -

Excellent!  More symbols than any sane person could ever use, even if many do 
not apply to caves.

Thanks!

Bill Gee

On Tuesday, November 11, 2014 20:00:27 Martin Sluka wrote:
> Something for inspiration:
> 
> http://ngmdb.usgs.gov/fgdc_gds/geolsymstd/fgdc-geolsym-sec10.pdf
> 
> http://pubs.usgs.gov/tm/2006/11A02/   :D
> 
> m.s.
> 


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