Norian

The stage was introduced into scientific literature by Austrian geologist Edmund Mojsisovics von Mojsvar in 1869.

The Norian Stage begins at the base of the ammonite biozones of Klamathites macrolobatus and Stikinoceras kerri, and at the base of the conodont biozones of Metapolygnathus communisti and Metapolygnathus primitius.

The top of the Norian (the base of the Rhaetian) is at the first appearance of ammonite species Cochloceras amoenum.

The base of the Rheatian is also close to the first appearance of conodont species Misikella spp.

The Revueltian land-vertebrate faunachron corresponds to part of the Norian.

Cast of a tridactyl footprint of a theropod dinosaur from the Norian of the Czech Republic .