Pozzolan up close

Property:?Northern California

Type of resource:?Pozzolan

Products this helps produce:?Purebase Pozzolan, Purebase Build SCM

Purebase Pozzolan magnified 1,000 x under a scanning electron microscope.

Purebase Pozzolan is extracted from a surface mine located in Lassen County, Northern California. This deposit originated 26 million years ago when nearby volcanoes erupted and the volcanic ash was deposited into freshwater lakes. These freshwater lakes contained large amounts of protozoa called “diatoms”. This tiny organism is extremely porous and adsorbent.