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

Also known as Tuma-1 Well, 2900-3200 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: lacustrine; lithified, gray, argillaceous, silty shale

• Lithologic unit 1 was found to be composed of light grey shale, clay laminae and shows no effervescence. The environment of deposition of this lithologic unit was deduced to be lacustrine 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 139248: authorized by Carlos Jaramillo, entered by Gabriela Doria on 10.02.2013

Creative Commons license: CC BY (attribution)

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