Aptian (~ 125 Ma)

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Representation and status

Index
apt
CMYK Color
25 / 0 / 45 / 0
RGB color
R: 191 G: 228 B: 138
Rank
chronostratigraphic Stage
Validity
Unit is in Use
Status
valid formal name
SCS note
-
SCS date
-
Comment
-

Nomenclature

German
Aptien (CH ; DE/AT: Aptium)
French
Aptien
Italian
Aptiano
English
Aptian (~ 125 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
Nomenclatorial Remarks
-

Synonyms

Synonyms
Non-synonyms
Possible confusion

Description

Description
-
Geomorphology
-
Thickness
-

Components

Lithological content
-
Mineral content
-
Fossil content
-

Hierarchy and succession

Superordinate unit
Subordinate units
Units at roof
    -
Units at floor
Lateral equivalents
Upper boundary
-
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.
Stratigraphic discussion
-

Age

Age at top
Aptian
Note about top
-
Age at base
Aptian
Note about base
-
Dating method
-

Geography

Geographical extent
-
Type area
Type locality
-
Type profile
-
Reference profiles
-
Point of interest
-

Paleogeography and tectonic

Paleogeography
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Kind of protolith
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Conditions of formation
-
Sequence
-
Tectonic Unit (resp. main category)
Time Scale
  • Paratethys
  • Mammal stages
Metamorphism
-
Metamorphic facies
-
Note on metamorphism
-

References

Definition
-
Revision
-
Important publications
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Material and varia

Applications
-
  • Clansayésien

    Origin of the Name

    Named after the village of Clansayes (Drôme, France).

    Rank
    chronostratigraphy
    Status
    local name (informal)
    Valid name
    In Short
    Local chronostratigraphic substage corresponding to the Late Aptian.
    Age
    Late Aptian - Earliest Albian
    Thickness
    -
    Geographical extent
    -
    Type area
    -
    Comment
    -
  • Gargasian

    Origin of the Name

    Named after the village of Gargas (Vaucluse, France).

    Rank
    chronostratigraphic Substage
    Status
    local name (informal)
    Valid name
    In Short
    Local chronostratigraphic subdivision corresponding to the latest Early Aptian and to the Middle Aptian.
    Age
    Early Aptian - Middle Aptian
    Thickness
    -
    Geographical extent
    -
    Type area
    -
    Comment
    -
  • Bedoulian

    Origin of the Name

    Named after the village of La Bédoule (Bouches-du-Rhône, France), near Cassis.

    Rank
    chronostratigraphy
    Status
    local name (informal)
    Valid name
    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 - Early Aptian
    Thickness
    -
    Geographical extent
    -
    Type area
    -
    Comment
    The Bedoulian encompasses the Deshayesites oglanlensis, D. forbesi and D. deshayesi Zones, whereas the Dufresnoyia furcata Zone at the top of the Early Aptian is considered to define the base of the Gargasian. Hence the Bedoulian does not fully correspond to the Early Aptian.