Middle Toarcian

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Representation and status

Color CMYK
(33%,9%,0%,11%)
Color RGB
R: 153 G: 206 B: 227
Rank
chronostratigraphic Substage
Validity
Unit is in Use
Status
valid formal name
Status discussion

Nomenclature

Deutsch
Mittleres Toarcium (CH: Mittleres Toarcien)
Français
Toarcien moyen
Italiano
Toarciano medio
English
Middle Toarcian

Hierarchy and sequence

Lower boundary
Base defined by the firts appearance of the ammonite genus Hildoceras (more specifically by the species H. sublevisoni, which succeded to Orthildaites douvillei).

Age

Age at top
  • middle Toarcian
Note about top
Variabilis/Gradata Zone, Vitiosa Subzone
Age at base
  • middle Toarcian
Note about base
Bifrons Zone, Sublevisoni Subzone
Dating Method
Ammonite biostratigraphy.
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