Lithographic limestones

[DSFPortree@aol.com]

Hello -

I'm working on a script for EARTH & SKY radio on lithographic limestones - how
they form, the fossils one finds in them, their use in printing, etc. I'm
looking for authorities on this subject, but haven't had much luck yet in
finding them. 

Can anyone steer me the right way? Please reply to my email address
(dsfportree@aol.com).

Thanks -

David

*************************************
David S. F. Portree
Freelance writer focused on discovery
dsfportree@aol.com
http://members.aol.com/dsfportree/discovery.htm
Houston Texas USA

"Something hidden - go and find it!"
                       -- Rudyard Kipling