Toarcian (Lower Jurassic) ammonite biostratigraphy and ammonite fauna of North America

• Main Author: Jakobs, ,Giselle Kathleen
• Format: Thesis
• Language: English
• Published: 1992
• Subjects: Arctic; Yukon; Pacific; Queen Charlotte; Athabascan; sverdrup basin; Alaska; Siberia
• Online Access: http://hdl.handle.net/2429/2990

Toarcian ammonite collections from British Columbia, Nevada, Oregon, the Yukon, and Alaska form the basis of a detailed taxonomic study. Fifty-seven species are described, allocated to 27 genera, one of which is new ( Yakounia). Nine new species are introduced: Yakouma yakounensis, Y. pacifica, Y. f...