Roger Weller, geology instructor
[email protected] 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.