… Siliceous fossil meals (for example, kieselguhr, tripolite and …
Explanatory notes
… 25.12 ‑ S iliceous fossil meals (for example, kieselguhr, tripolite and … less. These materials are siliceous earths formed of small fossilised organisms (diatoms, etc.) and are very light. … are sometimes incorrectly called “infusorial earths”. Most of these earths are used for the manufacture of …