Aptian (~ 121.4 Ma)
Back to Barremian (~ 129.4 Ma)Representation and status
- Index
- apt
- Color CMYK
- 25 / 0 / 45 / 0
- Color RGB
- R: 191 G: 228 B: 138
- Rank
- chronostratigraphic Stage
- Validity
- Unit is in Use
- Status
- valid formal name
Nomenclature
- Deutsch
- Aptien (CH ; DE/AT: Aptium)
- Français
- Aptien
- Italiano
- Aptiano
- English
- Aptian (~ 121.4 Ma)
- Origin of the Name
-
Named after the town of Apt (Vaucluse, France).
- Historical Variants
-
Aptien (d'Orbigny 1840, Sornay et al. 1957), 26e Etage = Aptien (Greppin 1866), Aptésien (Kilian 1910), Néocomien supérieur
Hierarchy and sequence
- Subordinate units
- Units at roof
- Lower boundary
-
The base of the Aptian is determined by the geomagnetic reversal at the start of the M0r chronozone, which is biologically near the first appearance of the ammonite Paradeshayesites oglanlensis.
Age
- Age at top
-
- Aptian
- Age at base
-
- Aptian
Geography
- Type area
- Vaucluse (France)
-
Clansayésien
- Name Origin
-
Named after the village of Clansayes (Drôme, France).
- Rank
- chronostratigraphy
- Status
- local name (informal)
- In short
- Local chronostratigraphic substage corresponding to the Late Aptian.
- Age
- Late Aptian
-
Gargasian
- Name Origin
-
Named after the village of Gargas (Vaucluse, France).
- Rank
- chronostratigraphic Substage
- Status
- local name (informal)
- In short
- Local chronostratigraphic subdivision corresponding to the latest Early Aptian and to the Middle Aptian.
- Age
- Early Aptian
-
Bedoulian
- Name Origin
-
Named after the village of La Bédoule (Bouches-du-Rhône, France), near Cassis.
- Rank
- chronostratigraphy
- Status
- local name (informal)
- Valid term
- Aptian
- In short
- Local chronostratigraphic subdivision designating the Early Aptian. The Bedoulian, based on pelagic deposits (Marno-calcaires de la Bedoule), is approximately equivalent to the Rhodanian, which is based on littoral deposits.
- Age
- Early Aptian
-
Selli level (OAE 1a)
- Name Origin
-
Named after the Italian geologist Raimondo Selli (1916-1983).
- Rank
- Oceanic Anoxic Event
- Status
- valid
- In short
-
Oceanic anoxic event at the base of the Aptian (around 120 Ma ago) with a major impact on the chemistry of the oceans worldwide.
- Age
- Early Aptian