Carb-D-E Formation

Carb-D-E Fm

Period:

Carboniferous.

Age Interval:

Serpukhovian – Bashkirian (?).

Province:
Illizi Basin

Type Locality and Naming

“Carboniferous formations are divided into members, each having a code from A to F, with A being the oldest and F the youngest” (USGS-Klett, 2000, summary). [NOTE: For clarity and to separate from the “F2” etc. set of Devonian, then the prefix “Carb-“ is added to this Lexicon.]

Synonym: D member, E member

References: Benvegnù, 2020

Lithology and Thickness

The lower part of formation is made up of sandstone, siltstone and dolomitic limestone deposition overlain by marine shales and stromatolitic limestones (Benvegnù, 2020).

Lithology Pattern:

Shallow-marine marl

Relationships and Distribution

Lower contact

It conformably overlies the Carb-A-B-C Fm.

Upper contact

It is conformably overlain by the Carb-F Fm.

Regional extent

Illize Basin of SE Algeria

GeoJSON

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Fossils

Age

upper-middle Carboniferous

Age Span:

Beginning stage:

Serpukhovian

Fraction up in beginning stage:

0.00

Beginning date (Ma):

330.34

Ending stage:

Bashkirian

Fraction up in the ending stage:

1.0

Ending date (Ma):

315.15

Depositional setting

Deltaic to shallow marine environment (Benvegnù, 2020)

Depositional pattern:

Additional Information

Compiler:

Enam O. Obiosio, Solomon Joshua Avong and Henry Nasir Suleiman (2024) - Stratigraphic Lexicon compiled from the following books:

Benvegnù I. (2020): Thermal Evolution of Paleozoic and Triassic Reservoir Rocks in the Ghadames-Illizi Basin (Algeria). An unpublished MSc thesis at Universita’ degli Studi di Padova.

T.R. Klett (2000): Province, Algeria, Tunisia, and Libya - The Tanezzuft-Oued Mya, Tanezzuft-Melrhir, and Tanezzuft-Ghadames. U.S. Geological Survey Bulletin, 2202-C.