Nkalagu Shale - Sample 14, Section Band 18 (Cretaceous of Nigeria)

Where: Nigeria (6.5° N, 7.5° E: paleocoordinates 7.4° S, 0.6° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Inoceramud costellatus inoceramid zone, Nkalagu Shale Formation, Middle Turonian (93.5 - 89.3 Ma)

• STRATIGRAPHIC RELATIONS: From Nkalagu Shale, which has formely been subdivided into Eze-Aku (Coniacian) and Awgu (Turonian) Formations on the basis of faunal content. THICKNESS: From thin (decemeter) bed within 26 m thick section. AGE: upper Middle Turonian based on inoceramid biostratigraphy; Inoceramus costellatus zone. STRATIGRAPHIC POSITION: From stage 9, near base of Nkalagu Shale.

• group of beds-level stratigraphic resolution

Environment/lithology: basinal (); lithified shale

• ENVIRONMENT: From bathyal settings with instable substrates and moderate current regimes.
• SPECIFIC LITHOLOGY: Shales, sometimes silty shales, within shale dominated unit, which is sometimes intercalated by limestones and marls. LITHIFICATION: Lithified, based on observation of figures.

Size class: macrofossils

Preservation: cast, mold/impression

Collection methods: surface (in situ),

• COLLECTOR: H. Gebhardt and O. J. Ojo. REPOSITORY: Not stated, presumably Phililips Universität Marburg, Marburg.

Primary reference: H. Gebhardt. 2001. Inoceramids, Didymotis and ammonites from the Nkalagu Formation type locakity (late Turonian to Coniacian, southern Nigeria):biostratigraphy and palaeoecologic implications). Neues Jahrbuch für Geologie und Palaeontologie, Monatshefte 2001(4):193-212 [A. Hendy/A. Hendy]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 69426: authorized by Austin Hendy, entered by Austin Hendy on 26.02.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Only includes inoceramids, some bivalves and ammonites. NOMENCLATURES: Appears relatively modern, and with species-level assignments.
Show authors, comments, and common names
Bivalvia
 Myalinida - Inoceramidae
Inoceramus cf. longealatus, Inoceramus cf. costellatus
Inoceramus cf. longealatus Tröger 1967 clam