Hi Lizelle. Good to be back to steemit after quite a few very busy days. Hope all is well with you :)
While I am not a geologist nor minerologist from what I have read it is volcanic ash but that over time has reacted with alkaline ground water to come into fruition. All different types of minerals are classified as zeolites. I'm not sure the exact classification of the ones that we found. I know that they use different zeolite for all types of applications due to its amazing absorption capacities. It can absorb toxic chemicals and even radiation. Apparently it was also the primary source for cat litter for many years.
I have been really curious about all of the physiological benefits but unfortunately haven't read too much on it. I imagine that it's industrial chelating properties would very well carry over to the human body system.

I always have a hard time trying to figure out which technical facts I should add to my posts so seem to stick to hoping I've sparked someone to go read more about it.