Kanawa, Zambuk Ridge (Cretaceous of Nigeria)

Where: Nigeria (10.3° N, 11.3° E: paleocoordinates 4.6° S, 4.0° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Pindiga Formation, Early/Lower Turonian (93.5 - 89.3 Ma)

• STRATIGRAPHIC RELATIONS: From the Pindiga Fm (Turonian-Coniacian), which overlies the Yolda Fm (Cenomanian) is overlain by the Gulani Fm (Santonian-Maastrichtian). AGE: Early Turonian, on the basis of ammonite biostratigraphy. STRATIGRAPHIC POSITION: From unknown position within the section.

• group of beds-level stratigraphic resolution

Environment/lithology: coastal; lithified, concretionary, shelly/skeletal limestone and lithified, blue shale

• ENVIRONMENT: Presumably an shallow siliciclastic marine facies.
• SPECIFIC LITHOLOGY: Alternating fossiliferous and nodular or rubbly limestones and blue shales. LITHIFICATION: Lithified, on the basis of figured specimens.

Size class: macrofossils

Preservation: cast, mold/impression

Collection methods: surface (in situ),

• COLLECTOR: Not stated in text, but presumably including the authors. REPOSITORY: Not stated in text.

Primary reference: W. Barber. 1957. Lower Turonian ammonites from north-eastern Nigeria. Geological Survey of Nigeria Bulletin 26:1-87 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 83021: authorized by Austin Hendy, entered by Austin Hendy on 05.08.2008, edited by Matthew Clapham

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for ammonoids and bivalves, and sometimes including fish. NOMENCLATURE: Not an authoritative publication, and with somewhat antiquated nomenclature. Mostly identified to species resolution.
Echinoidea
 Spatangoida - Hemiasteridae
"Hemiaster (Mecaster) sp." = Mecaster2
"Hemiaster (Mecaster) sp." = Mecaster2 Pomel 1883 heart urchin
 Hemicidaroida -
Micropedina olisiponensis2 Forbes in Sharpe 1850 sea urchin
Cephalopoda
 Ammonitida - Vascoceratidae
Fagesia involuta Barber 1957 ammonite
Vascoceras globosum Reyment 1954 ammonite
Vascoceras bulbosum2 Reyment 1954 ammonite
 Ammonitida - Acanthoceratidae
Pseudaspidoceras barberi3 Meister 1989 ammonite
 Ammonitida - Pseudotissotiidae
Eotissotia simplex, "Gombeoceras gongilense" = Thomasites gongilensis, "Pseudotissotia (Wrightoceras) wallsi" = Thomasites wallsi, "Pseudotissotia (Bauchioceras) nigeriensis" = Pseudotissotia nigeriensis
Eotissotia simplex Barber 1957 ammonite
"Gombeoceras gongilense" = Thomasites gongilensis Woods 1911 ammonite
"Pseudotissotia (Wrightoceras) wallsi" = Thomasites wallsi Reyment 1954 ammonite
"Pseudotissotia (Bauchioceras) nigeriensis" = Pseudotissotia nigeriensis Woods 1911 ammonite
includes ssp. bicarinata, tabulata
Gastropoda
 Architaenioglossa - Ampullinidae
Ampullospira bulbiformis1 d'Orbigny 1842 snail
 Sorbeoconcha - Aporrhaidae
"Strombus incertus" = Harpagodes nodosus1
"Strombus incertus" = Harpagodes nodosus1 Sowerby 1823 snail
Bivalvia
 Pectinida - Plicatulidae
"Plicatula ferryi" = Plicatula (Plicatula) ferryi1
"Plicatula ferryi" = Plicatula (Plicatula) ferryi1 Coquand 1862 scallop
 Ostreida - Gryphaeidae
"Exogyra olisiponensis" = Costagyra olisiponensis1
"Exogyra olisiponensis" = Costagyra olisiponensis1 Sharpe 1850 oyster
 Cardiida - Cardiidae
"Cardium (Trachycardium) productum" = Granocardium productum1
"Cardium (Trachycardium) productum" = Granocardium productum1 Sowerby 1832 cockle
 Cardiida - Arcticidae
"Arctica" globosa1 Sharpe 1850 clam
 Pholadomyida - Pholadomyidae
Pholadomya aff. pedernalis1 Roemer 1852 clam
 Carditida - Astartidae
Astarte awensis1 Woods 1911 clam