Hettangian
Sign in to saveAlso known as Hettangian Age, Hettangian Stage
The Hettangian is the earliest age and lowest stage of the Jurassic Period of the geologic timescale. It spans the time between 201.3 ± 0.2 Ma and 199.3 ± 0.3 Ma (million years ago). The Hettangian follows the Rhaetian (part of the Triassic Period) and is followed by the Sinemurian.
Key facts
- Geologic timespan.name
- Hettangian
- Geologic timespan.color
- Hettangian
- Geologic timespan.time_start
- 201.4
- Geologic timespan.time_start_uncertainty
- 0.2
- Geologic timespan.time_end
- 199.5
- Geologic timespan.time_end_uncertainty
- 0.3
- Geologic timespan.image_map
- File:200Ma Mollweide.png
- Geologic timespan.caption_map
- Mollweide map of Earth 200 million years ago, with black outlines depicting countries in their locations
- Geologic timespan.timeline
- Jurassic
- Geologic timespan.name_formality
- Formal
- Geologic timespan.celestial_body
- earth
- Geologic timespan.usage
- Global (ICS)
- Geologic timespan.timescales_used
- ICS Time Scale
- Geologic timespan.chrono_unit
- Age
- Geologic timespan.strat_unit
- Stage
- Geologic timespan.timespan_formality
- Formal
- Geologic timespan.lower_boundary_def
- FAD of the Ammonite Psiloceras spelae tirolicum.
- Geologic timespan.lower_gssp_location
- Kuhjoch section, Karwendel mountains, Northern Calcareous Alps, Austria
via Wikipedia infobox
Wikidata facts
- Instance of
- age
- Named after
- Hettange-Grande
- Followed by
- Sinemurian
- Follows
- Rhaetian
Show 5 more facts
- topic's main category
- Category:Hettangian
- sRGB color hex triplet
- 00BBEB
- start time
- 201300000-
- end time
- 199300000-
- named by
- Eugène Renevier
Sources (3)
via Wikidata · CC0
~2 min read
Encyclopedic overview
7 sectionsContents
- Stratigraphic definitions
- Biostratigraphy
- See also
- References
- Notes
- Literature
- External links
The Hettangian is the earliest age and lowest stage of the Jurassic Period of the geologic timescale. It spans the time between 201.3 ± 0.2 Ma and 199.3 ± 0.3 Ma (million years ago). The Hettangian follows the Rhaetian (part of the Triassic Period) and is followed by the Sinemurian.
In European stratigraphy the Hettangian is a part of the time span in which the Lias was deposited. An example is the British Blue Lias, which has an upper Rhaetian to Sinemurian age. Another example is the lower Lias from the Northern Limestone Alps where well-preserved but very rare ammonites, including Alsatites, have been found.
Excerpted from Wikipedia’s “Hettangian” article, available under the CC BY-SA 4.0 licence.
On the map
4 mapped locations