Ladinian

Ladinian
~242 – ~237 Ma
Monte San Giorgio exhibits exceptionally preserved Ladinian vertebrate fossils
Chronology
Etymology
Name formalityFormal
Usage information
Celestial bodyEarth
Regional usageGlobal (ICS)
Time scale(s) usedICS Time Scale
Definition
Chronological unitAge
Stratigraphic unitStage
Time span formalityFormal
Lower boundary definitionFAD of the Ammonite Eoprotrachyceras curionii
Lower boundary GSSPBagolino, Lombardian pre-Alps, Italy
45°49′09″N 10°28′16″E / 45.8193°N 10.4710°E / 45.8193; 10.4710
Lower GSSP ratified2005
Upper boundary definitionFAD of the Ammonite Daxatina canadensis
Upper boundary GSSPPrati di Stuores, Dolomites, Italy
46°31′37″N 11°55′49″E / 46.5269°N 11.9303°E / 46.5269; 11.9303
Upper GSSP ratified2008

The Ladinian is a stage and age in the Middle Triassic series or epoch. It spans the time between 242 Ma and ~237 Ma (million years ago). The Ladinian was preceded by the Anisian and succeeded by the Carnian (part of the Upper or Late Triassic).

The Ladinian is coeval with the Falangian regional stage used in China.

Stratigraphic definitions

The GSSP of the Ladinian at Bagolino in Italy

The Ladinian was established by Austrian geologist Alexander Bittner in 1892. Its name comes from the Ladin people that live in the Italian Alps (in the Dolomites, then part of Austria-Hungary).

The base of the Ladinian Stage is defined as the place in the stratigraphic record where the ammonite species Eoprotrachyceras curionii first appears or the first appearance of the conodont Budurovignathus praehungaricus. The global reference profile for the base (the GSSP) is at an outcrop in the river bed of the Caffaro river at Bagolino, in the province of Brescia, northern Italy. The top of the Ladinian (the base of the Carnian) is at the first appearance of ammonite species Daxatina canadensis.

The Ladinian is sometimes subdivided into two subages or substages, the Fassanian (early or lower) and the Longobardian (late or upper). The Ladinian contains four ammonite biozones, which are evenly distributed among the two substages:

Ladinian life

Notable formations

* Tentatively assigned to the Ladinian; age estimated primarily via terrestrial tetrapod biostratigraphy (see Triassic land vertebrate faunachrons)


This page was last updated at 2024-04-17 15:45 UTC. Update now. View original page.

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