Asselian (298.9 +/-0.15 Ma)

Representation and status

Color CMYK

10 / 60 / 55 / 0

Color RGB

R: 227 G: 99 B: 80

Rank

chronostratigraphic Stage

Validity

Unit is in Use

Status

valid formal name

Nomenclature

Deutsch

Assélien (CH ; DE/AT: Asselium)

Français

Assélien

Italiano

Asseliano

English

Asselian (298.9 +/-0.15 Ma)

Origin of the Name

Named after the Assel River, southern Ural Mountains (Kazakhstan / Bashkortostan).

Historical Variants

Ruzhenchev 1954

Hierarchy and sequence

Units at roof

• Sakmarian (293.52 +/-0.17 Ma)

Lower boundary

Base defined by the first appearance of the conodont Streptognathodus isolatus. GSSP located in the valley of the Aidaralash River, near Aqtöbe in the Ural Mountains of Kazakhstan.

Age

Age at top

• Asselian

Age at base

• Asselian

Geography

Type area

Ural Mountains