Damian, si no me equivoco toda la arena de construcción es de silice. La que dicen calcarea debe ser la conchilla y es blanca. Inclusive la arena de las playas de acá es principalmente silicea. Saludos Mariano
[Non-text portions of this message have been removed] ------------------------ Yahoo! Groups Sponsor --------------------~--> Great things are happening at Yahoo! Groups. See the new email design. http://us.click.yahoo.com/SktRrD/hOaOAA/yQLSAA/ctpplB/TM --------------------------------------------------------------------~-> Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/aquaplanta/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
