Biostratigraphic units are also called biozones.
Notes on verification
Confirmed by multiple authoritative geological sources including Britannica and the International Commission on Stratigraphy, showing consistent terminology usage. [cascade flags: aggregator_dropped_primary_exists | tier=bronze indep_score=0.3 clusters=3 claim_tier=everyday]
Sources
- Biozone (wikipedia)
- https://stratigraphy.org/guide/bio (corroboration)
- https://geocopy.wordpress.com/2016/01/04/biostratigraphy/ (corroboration)
- https://geologybase.com/biozones/ (corroboration)