Tuma-1 Well, Lithologic Unit 3, 3610-3620 m (Cretaceous to of Nigeria)

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

When: Bima 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 139280: authorized by Carlos Jaramillo, entered by Gabriela Doria on 10.02.2013

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Equisetopsida
 Cupressales - Pinidae
 Pinidae - Pinidae
Classopollis sp. Pflug 1953
Classopollis brasiliensis Herngreen 1975
Galeacornea causea
  -
Galeacornea causea Stover 1963 elaterate
Galeacornea clavis
  -
Galeacornea clavis Stover 1963 elaterate
Algae
  - Botryococcaceae
Monocolpites
  -
Monocolpites sp. Van der Hammen 1954
Polypodiopsida
  -
Verrucosisporites sp. Potonie and Kremp 1954
Cycadopsida
 Gnetales -
Elaterosporites klaszii Jardiné 1967 elaterate
Ginkgoopsida
 Ephedrales -
Angiospermae
 Malpighiales - Euphorbiaceae
Tricolporopollenites sp. Thomson and Pflug 1953 spurge
Tricolporopollenites "spscl" Thomson and Pflug 1953 spurge
Dicotyledoneae
  -
Triorites africaensis Jardiné and Magloire 1965
Angiospermae
  -
 Gunnerales -
Tricolpites sp. Couper 1953
 Buxales - Didymelaceae
 Austrobaileyales - Trimeniaceae
  -
Monosulcites sp. Cookson and Couper 1953
Afropollis jardinus Doyle et al. 1982
Magnoliopsida
  -
Tricolporites sp. Cookson 1947
Dinophyceae
 Gonyaulacales -
Batiacasphaera sp. Drugg 1970
 Peridiniales - Peridiniaceae
"Senegalinium sp." = Deflandrea, Senegalinium bicavatum
"Senegalinium sp." = Deflandrea Eisenack 1938
Senegalinium bicavatum Jain and Millepied 1971