Cenomanian ammonites from the condensed deposits of the Helvetic domain (western Alps, France and Switzerland)

Journal article

The Cenomanian ammonites of the Helvetic Domain (French-Swiss Western Alps) are revised and illustrated for the first time since the middle of the 19th century. The faunas occur in remarkable condensed hemipelagic glauconite-rich biomicrites that also contain planktic foraminifera and small stromatolites. Thirty-three ammonite species referred to 15 genera are described; the assemblage extends from the lower part of the Lower Cenomanian Mantelliceras mantelli Zone (Neostlingoceras carcitanens...

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Authors: Delamette, M; Kennedy, W

• Journal: Journal of Paleontology
• Volume: 65
• Issue: 3
• Pages: 435-465
• Publication date: 1991-01-01
• ISSN: 0022-3360
• Language: English