Tuma-1 Well, Lithologic Unit 2 (Cretaceous to of Nigeria)

Also known as Tuma-1 Well, 3200-3475 m depth interval

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 139249: authorized by Carlos Jaramillo, entered by Gabriela Doria on 10.02.2013

Creative Commons license: CC BY (attribution)

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