. Bulletin of the British Museum (Natural History), Geology. P. M. P. ZABORSKI from Calabar) 4? direction of dip observed or ^Mf* inferred fold axes. \ LATE TERTIARY (Benin Fm.) UPPER CAMPANIAN-LOWER MAASTRICHTIAN (Nkporo Shale) _^ Fig. 1 Map showing road section north of Calabar and localities of fossils mentioned in the text: western portion. dibleyi (Spath), Forbesiceras obtectuml, Acanthoceras amphibolum Morrow, Acan- thoceras sp. Fauna 8. 30-3km from Calabar: Anagaudryceras involvulum (Stoliczka), Turrilites (T.) acutus Passy, Forbesiceras obtectum, Calycoceras (Newboldiceras) annulatum C
. Bulletin of the British Museum (Natural History), Geology. P. M. P. ZABORSKI from Calabar) 4? direction of dip observed or ^Mf* inferred fold axes. \ LATE TERTIARY (Benin Fm.) UPPER CAMPANIAN-LOWER MAASTRICHTIAN (Nkporo Shale) _^ Fig. 1 Map showing road section north of Calabar and localities of fossils mentioned in the text: western portion. dibleyi (Spath), Forbesiceras obtectuml, Acanthoceras amphibolum Morrow, Acan- thoceras sp. Fauna 8. 30-3km from Calabar: Anagaudryceras involvulum (Stoliczka), Turrilites (T.) acutus Passy, Forbesiceras obtectum, Calycoceras (Newboldiceras) annulatum Collignon, Euomphaloceras cunningtoni alatum subsp. nov. Fauna 9. 32-2km from Calabar: Acanthoceras robustum Crick, Euomphaloceras cunningtoni alatum? Fauna 10. 34km from Calabar: Puzosia sp., Kamerunoceras tinrhertense Collignon, Coilopoceras aff. newelli Benavides-Caceres. In addition, there is a single specimen of Pseudocalycoceras cf. haughi (Pervinquiere), of which the exact horizon within the Odukpani Formation is unknown. From the Nkporo Shale the full list is: Fauna 11. 35-5-36-3 km from Calabar: Gaudryceras varicostatum van Hoepen, Pseudoxy- beloceras (Parasolenoceras) aff. splendens Collignon, Didymoceras aff. hornbyense (Whiteaves), D. aff. cheyennense (Meek & Hayden), Baculites sp., Pachydiscus (P.) egertoni (Forbes), Libycoceras afikpoense Reyment, Sphenodiscus lobatus lobatus (Tuomey). Fauna 12. 36-3-36-7km from Calabar: Nostoceras sp., Libycoceras crossense Zaborski. Fauna 13. 42km from Calabar: Gaudryceras beantalyense Collignon, Baculites sp., Pachydis- cus (P.) dossantosi (Maury), Sphenodiscus lobatus costatus Zaborski. These faunas add considerably to knowledge of Nigerian ammonite sequences and allow a more detailed correlation to be made with other parts of the world than has hitherto been possible. They also provide some palaeogeographical information on the opening of the South Atlantic Ocean and the extent of the late Cretaceous transgression in weste
Size: 2338px × 1069px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorbritishmuseumnaturalhistory, bookcentury1900, bookcoll
