Title: Early Cretaceous (Albian) ammonites from the Chitina Valley and Talkeetna Mountains, Alaska
Description: "The Early Cretaceous (Albian) ammonites in southern Alaska have strong affinities with those in California and Oregon but are in part of Boreal and Eurasian origin."
Subjects: Ammonoidea, Stratigraphic Geology
Time periods: Cretaceous