Biostratigraphic units, also called biozones, are intervals of geological strata defined based on characteristic fossil taxa.
Notes on verification
Confirmed by authoritative sources including the International Commission on Stratigraphy's official guide and Geoscience Australia, both corroborating the definition nearly verbatim.
Sources
- Biozone (en.wikipedia.org)
- https://stratigraphy.org/guide/bio (stratigraphy.org)
- https://www.ga.gov.au/scientific-topics/disciplines/biostratigraphy (ga.gov.au)