A geologist trick...
A dry material containing a lot of clay sticks to the tongue
(due to the huge affinity of these minerals to water)
![[Keine Beschreibung eingegeben]](http://www.csc-sarl.ch/files/cecilia_langue_argiles_580px.jpg)
Thank you very much Cecilia...
A dry material containing a lot of clay sticks to the tongue
(due to the huge affinity of these minerals to water)
Thank you very much Cecilia...