PBDB Collection

Tuma-1 Well, Lithologic Unit 2, 3260-3290 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: fluvial; lithified, graded, bioturbated, fine-grained, medium, ferruginous, sandy sandstone

• lithologic unit II is predominantly composed of sandstone, fine to granule in size, angular to rounded, moderate sorting and moderate porosity, feruginised and strongly associated with rootling. It is rarely intercalated with thin shale beds. The upper part of the sandstone body shows an upward coarsening sequence (3310m-3230m) compared to the underlying massive sandstone bed. The associated characteristics suggest a sandstone body deposited in a fluvial environment.

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 139266: authorized by Carlos Jaramillo, entered by Gabriela Doria on 10.02.2013

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names

unclassified
-	"Forma" ("PO") "lawal", Cyathiditesw sp., "Smoothverrucose" "spore", "Trilete" "Spore", "Dinoflagellate" "cyst" "Forma" ("PO") "lawal" Cyathiditesw sp. "Smoothverrucose" "spore" "Trilete" "Spore" "Dinoflagellate" "cyst"
Dinophyceae
Peridiniales - Peridiniaceae	"Senegalinium sp." = Deflandrea, Senegalinium bicavatum "Senegalinium sp." = Deflandrea Eisenack 1938 Senegalinium bicavatum Jain and Millepied 1971
Gonyaulacales -	Batiacasphaera sp. Batiacasphaera sp. Drugg 1970
Polypodiopsida
-	Verrucosisporites sp. Verrucosisporites sp. Potonie and Kremp 1954
Algae
- Botryococcaceae	Botryococcus bruni Botryococcus bruni
Ginkgoopsida
Ephedrales -	Ephedripites multicostatus Ephedripites multicostatus Brenner 1963
Cycadopsida
Gnetales -	Elaterosporites klaszii Elaterosporites klaszii Jardiné 1967 elaterate
Monocolpites
-	Monocolpites sp. Monocolpites sp. Van der Hammen 1954
Equisetopsida
Cupressales - Pinidae	Inaperturopollenites sp. Inaperturopollenites sp. Potonié 1966
Pinidae - Pinidae	Classopollis sp., Classopollis brasiliensis Classopollis sp. Pflug 1953 Classopollis brasiliensis Herngreen 1975
Magnoliopsida
-	Tricolporites sp. Tricolporites sp. Cookson 1947
Angiospermae
-	Afropollis jardinus Afropollis jardinus Doyle et al. 1982
Austrobaileyales - Trimeniaceae	Cretacaeiporites polygonalis, Cretacaeiporites mulleri, Cretacaeiporites scabratus Cretacaeiporites polygonalis Herngreen 1974 Cretacaeiporites mulleri Herngreen 1973 Cretacaeiporites scabratus Herngreen 1974
-	Monosulcites sp. Monosulcites sp. Cookson and Couper 1953
Malpighiales - Euphorbiaceae	Tricolporopollenites sp., Tricolporopollenites "spscl" Tricolporopollenites sp. Thomson and Pflug 1953 spurge Tricolporopollenites "spscl" Thomson and Pflug 1953 spurge
-	Retimonocolpites sp. Retimonocolpites sp. Pierce 1961
Dicotyledoneae
-	Triorites africaensis Triorites africaensis Jardiné and Magloire 1965
Angiospermae
Gunnerales -	Tricolpites sp. Tricolpites sp. Couper 1953
Buxales - Didymelaceae	Hexaporotricolpites emelianovi Hexaporotricolpites emelianovi Boltenhagen 1967
Galeacornea clavis
-	Galeacornea clavis Galeacornea clavis Stover 1963 elaterate
Galeacornea causea
-	Galeacornea causea Galeacornea causea Stover 1963 elaterate