Erionite deposits have since been found on every continent, including Antarctica, and in 12 western U.S. states in addition to North Dakota. Some of the earliest deposits in the U.S. were discovered in Rome, Ore., (pdf) which was named after the column-like erionite-bearing rock formations outside of town.

Where do you find erionite?

Erionite is a naturally occurring, microscopic, fibrous mineral. It usually is found in volcanic ash that has been altered by weathering and ground water. Erionite forms brittle, wool-like fibrous masses in the hollows of rock formations.

What is erionite used for?

Therefore, the use of other zeolites may result in exposure to erionite among workers and members of the general population who use the zeolites in various processes and products. The commercial uses of other natural zeolites include pet litter, soil conditioners, animal feed, wastewater treatment, and gas absorbents.