Tuma-1 Well, Lithologic Unit 3, 3545-3565 m (Cretaceous to of Nigeria)

Where: Maiduguri, Nigeria (12.1° N, 13.1° E: paleocoordinates 5.4° S, 5.3° E)

When: Kerrikerri Formation (Bornu Basin Group), Albian to Albian (113.0 - 93.9 Ma)

Environment/lithology: lacustrine; lithified, graded, bioturbated, fine-grained, medium, ferruginous, argillaceous sandstone and lithified, fine-grained, gypsiferous, gray, argillaceous shale

• Lithologic unit III (3510-3620 m) heterolithic sand varying from sand, shale, gypsum to clay. The sandstone has the same textural properties to the massive sandstone body overlying it. The shale is dark grey in colour, fissile and moderately associated with about 30% gypsum content. However, the deepest sediment that probably overly the basement is sandy with minor clay (15%) content. Grain sizes vary from fine to granule, angular to rounded and generally moderately sorted.

Size class: microfossils

Preservation: original sporopollenin

Primary reference: A. O. Ola-Buraimo and O. A. Boboye. 2011. Palynological Investigation of the Albian to Lower Cenomanian Bima Formation, Bornu Basin, Nigeria. World Applied Sciences Journal 12(7):1026-1033 [C. Jaramillo/G. Doria]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 139277: authorized by Carlos Jaramillo, entered by Gabriela Doria on 10.02.2013

Creative Commons license: CC BY (attribution)

Taxonomic list

 Pinales - Cheirolepidiaceae
Classopollis sp. Pflug 1953
Classopollis brasiliensis Herngreen 1975
 Ephedrales - Ephedraceae
Ephedripites multicostatus Brenner 1963 jointfir
Afropollis jardinus
Afropollis jardinus Doyle et al. 1982
Monosulcites sp. Cookson and Couper 1953
 Gnetales -
Elaterosporites klaszii Jardiné 1967 elaterate
Verrucosisporites sp. Potonie and Kremp 1954
Tricolporites sp. Cookson 1947
 Euphorbiales - Dilleniidae
Tricolporopollenites sp. Thomson and Pflug 1953
Tricolporopollenites "spscl" Thomson and Pflug 1953
Triorites africaensis Jardiné and Magloire 1965
 Magnoliales - Trimeniaceae
 Buxales - Didymelaceae
Tricolpites sp. Potonié 1960
 Gymnospermophyta -
Galeacornea causea Stover 1963 elaterate
Galeacornea clavis Stover 1963 elaterate
Monocolpites sp. Van der Hammen 1954
 Peridiniales - Peridiniaceae
"Senegalinium sp." = Deflandrea, Senegalinium bicavatum
"Senegalinium sp." = Deflandrea Lentin and Williams 1976
Senegalinium bicavatum Jain and Millepied 1971
 Gonyaulacales -
Batiacasphaera sp. Drugg 1970
 Cupressales - Pinidae