Complexe Doleritique d’In Debirene Fm
Period:
Carboniferous
Age Interval:
Lower Carboniferous (Tournaisian) (1)
Province:
Iullemmeden Basin - Tim Mersoï Sub-basin
Type Locality and Naming
References: Lessard, 1961; Fabre et al., 1983; Mammar, 2012; Djellit et al., 2006
Synonym: Complexe Doleritique d’In Debirene Fm
Lithology and Thickness
Dolerites in circular chimneys and sills crossing the Cambrian-Ordovician and the Silurian and deforming the Devonian (Figure).
[Figure 1: Devonian lithostratigraphic column in the Tim Mersoï Sub-Basin showing a Lower Devonian dolerite intrusion of the " Complexe Doléritique d'In Debirene Fm " (Modified after Mammar, 2012) which has been dated to Lower Carboniferous (Tournaisian) by Djellit et al. (2006)]
Lithology Pattern:
Volcanics
Relationships and Distribution
Lower contact
Intrudes through older strata
Upper contact
Implied to end within Early Carboniferous.
Regional extent
GeoJSON
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Fossils
Age
Dated to Lower Carboniferous (Tournaisian) by Djellit et al. (2006).
Age Span:
Beginning stage:
Tournaisian
Fraction up in beginning stage:
0.35
Beginning date (Ma):
354.90
Ending stage:
Tournaisian
Fraction up in the ending stage:
0.6
Ending date (Ma):
351.76
Depositional setting
Volcanic
Depositional pattern:
Additional Information
Compiler:
Jacques LeBlanc (2022), Stratigraphic Lexicon: The Sedimentary Formations of The Republic of Niger, Africa. Colnes Publishing (Tallin, Estonia), 365 pp. https://doi.org/10.47909/978-9916-9760-6-7 (or via https://sites.google.com/site/leblancjacques)