page_title: Callovian
section_title: Subdivision
hierarchical_section_title: Callovian / Stratigraphic definitions / Subdivision
caption_attribution_description: English: Matmor Formation (Jurassic, Callovian) exposed in Makhtesh Gadol, Israel. (Electricity pylon for scale).
context_page_description: In the geologic timescale, the Callovian is an age and stage in the Middle Jurassic, lasting between 166.1 ± 4.0 Ma and 163.5 ± 4.0 Ma. It is the last stage of the Middle Jurassic, following the Bathonian and preceding the Oxfordian.
context_section_description: The Callovian is often subdivided into three substages (or subages): Lower/Early, Middle and Upper/Late Callovian. In the Tethys domain, the Callovian encompasses six ammonite biozones:
  zone of Quenstedtoceras lamberti
  zone of Peltoceras athleta
  zone of Erymnoceras coronatum
  zone of Reineckeia anceps
  zone of Macrocephalites gracilis
  zone of Bullatimorphites bullatus
caption: Matmor Formation (Callovian, Peltoceras athleta Zone) in Makhtesh Gadol, Israel.
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