Thomsonite Photos           
Cochise College               
Photos of Minerals
Geology Home Page

Roger Weller, geology instructor    copyright 2010-R.Weller

thomsonite in basalt-1
The mineral filling the vesicles in the basalt is thomsonite, a zeolite with a radiating
structure. As the lava is weathered, the thomsonite nodules show up as beach
pebbles along the western shore of Lake Superior.


thomsonite                                                                                                                                  rock1
Photo is copyright free only for non-commercial educational uses.
Just credit photo to R.Weller/Cochise College.