Heteromorph ammonites from the Upper Campanian (Upper Cretaceous) Baculites cuneactus and Baculites reesidei zones of the Pierre Shale in Colorado, USA

• Autorzy: Kennedy W. , Cobban W. , Scott G.
• Języki publikacji: EN

Abstrakty

EN

Calcareous sandstone concretions in the Upper Cretaceous Pierre Shale in Middle Park and in the Fort Collins area of Colorado in the U.S. Western Interior contain heteromorph ammonites of the families Nostoceratidae HYATT, 1894, and Diplomoceratidae SPATH 1926. The following species are described: Nostoceras cf. N. approximans (CONRAD 1855), Nostoceras cf. N. obtusum HOWARTH 1965, N. larimerense sp. nov., Nostoceras cf. N. splendidum (SHUMARD 1861) Didymoceras aurarium sp. nov., D. draconis (STEPHENSON 1941) Cirroceras conradi (MORTON 1841), Anaklinoceras minutum sp. nov., Solenoceras texanum (SHUMARD 1861), Solenoceras cf. S. reesidei STEPHENSON 1941, Lewyites oronensis (LEWY 1969) and Lewyites? sp. All these species are migrants from the Gulf coastal region. Didymoceras draconis and Cirroceras conradi are also known from the Delaware - New Jersey area and these two species, together with Solenoceras texanum are known from as far away as Israel

Słowa kluczowe

EN

ammonites; Campanian; Cretaceous; USA

• Wydawca: Faculty of Geology of the University of Warsaw ; Komitet Nauk Geologicznych PAN
• Czasopismo: Acta Geologica Polonica
• Rocznik: 2000
• Tom: Vol. 50, no. 1
• Strony: 1--20
• Opis fizyczny: Bibliogr. 60 poz., tab.

Twórcy

autor

Kennedy W.

autor

Cobban W.

autor

Scott G.

• Geological Collections, Oxford University Museum of Natural History, Parks Road, Oxford OX1 3PW, U.K.