Norian

(redirected from Norian Stage)
Also found in: Encyclopedia.

No´ri`an


a.1.(Geol.) Pertaining to the upper portion of the Laurentian rocks.
References in periodicals archive ?
Spray and his colleagues suggest a tentative link between the impacts and an earlier wave of extinctions, which occurred at the boundary between the Carnian and Norian stages of the Triassic.