Geological horizons can be recognized clays Plicatules the Aptian, Callovooxfordien argillites, clays and marls Gault clays Domerian
, without this list being exhaustive.
1976): Ecological ranges of selected Toarcian and Domerian
(Jurassic) foraminiferal species from Wales.
This author assigned to the Middle Domerian a level of red limestones with ferruginous oolites in the section of Morron de Totana, on the basis of an abundant ammonite fauna found together with Spiriferina cf.
The brachiopods studied in this work from Malvariche and Tres Carrascas Sections came from these sandy and crinoidal grainstones levels, characterized by a rich ammonite content indicating a Domerian to Toarcian age.
bochardi become very large in size during the Domerian (500 to 1000 Lim in diameter).
The diversity increases during the Carixian and stays high in the whole Domerian.
The diversity is somewhat lower than in the Domerian and in the Bajocian, but the number of individuals in a taxa is higher.