JBH-A4 Jebel Boulahoujeb, Lansarine Chain (Cretaceous of Tunisia)

Where: Tunisia (36.8° N, 9.6° E: paleocoordinates 23.2° N, 14.2° E)

• coordinate estimated from map

When: Criosarasinella furcillata ammonoid zone, El Mergueb Formation (M' Chergua Group), Late/Upper Valanginian (140.2 - 136.4 Ma)

Environment/lithology: marine; lithified, calcareous limestone

• The Jebel Boulahouajeb section belongs the Tunisian trough a strongly subsiding basin from the Jurassic to Cretaceous time span. It corresponds to a deep marine palaeoenvironment characterized by pelagic-deep deposits.
• The section JBH-A (50m thick) starts with a metric bed of red sandstone, followed by an alternation of yellowish limestones and gray marls, attributed to the upper Valanginian.

Size class: macrofossils

Preservation: cast, mold/impression, original aragonite, original calcite

Primary reference: S. Melliti, S. Reboulet, N. Ben Haj Ali, M. S. Arfaoui, F. Zargouni and L. Memmi. 2019. Ammonoid and foraminiferal biostratigraphy from uppermost Valanginian to lowermost Barremian of the Jebel Boulahouajeb section (northern Tunisia). Journal of African Earth Sciences 151:438-460 [A. Kocsis/M. Gomez Correa]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 205370: authorized by Adam Kocsis, entered by Monica Alejandra Gomez Correa on 13.10.2019

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Cephalopoda
 Ammonitida - Haploceratidae
"Neolissoceras grasianum" = Haploceras grasianum
"Neolissoceras grasianum" = Haploceras grasianum d'Orbigny 1841 ammonite
categories based on specimen counts
 Ammonitida - Olcostephanidae
Olcostephanus sp., Olcostephanus densicostatus
Olcostephanus sp. Neumayr 1875 ammonite
categories based on specimen counts
Olcostephanus densicostatus Wegner 1909 ammonite
categories based on specimen counts