Skip to main content

Paleoclimatology (thesaurus)

Search from vocabulary

align
annotate
download

Concept information

... > geologic time scale > geological age > Phanerozoic > Mesozoic > Jurassic > Lower Jurassic > Pliensbachian > Domerian

Preferred term

Domerian  

Definition

  • The Domerian is the upper substage of the Pliensbachian, itself a stage of the Lower Jurassic (Lias), succeeding the Sinemurian and preceding the Toarcian. Its age ranges from around -186 million years (Ma) to -182.7 Ma. The term Domerian comes from the geological formation of Domaro limestone (Calcare di Domaro), a Pliensbachian-age formation that outcrops widely in the southern Alps of Lombardy and, in particular, near the small town of Gardone Val Trompia in the province of Brescia. The Domerian is characterized by a very active continuation of the marine transgression that began in the Carixian, with a deepening of the basins and significant tectonic episodes, particularly in the Lower and Middle Domerian. The warm, humid climate that favored vegetation, combined with global volcanism, led to an increase in carbon levels, with regular episodes of marine anoxia. The transition to the Upper Domerian is a fine example of a marine extinction event known as "Thanatocenosis". In the Lower Domerian, known as the "Margaritatus" zone, the "Stokesi" oolitic sequence, inherited from the Carixian, continues, then diminishes significantly, reflecting a more oxygenated, humid climate. This is the characteristic "Gigantea" period, when the largest Pliensbachian marine fossils (Pectens, Belemnites, Gryphaea Gigantea oysters, Brachiopods and other characteristic Amaltea Ammonites) are found in powerful blue-gray limestone beds. In the Upper Domerian "Spinatum", the climate becomes intensely oxygenated, prolonging the Gigantea apogee somewhat. Eventually, the induced cooling leads to a lower sea level, with the last, much more condensed Domerian sediments partially emerging at the transition to the following Toarcian. (Adapted and translated from: https://fr.wikipedia.org/wiki/Dom%C3%A9rien)

Broader concept

In other languages

URI

http://data.loterre.fr/ark:/67375/QX8-D40PL783-0

Download this concept:

RDF/XML TURTLE JSON-LD