Geologia Croatica, Vol. 73 No. 2, 2020.
Original scientific paper
https://doi.org/10.4154/gc.2020.10
First record of trace fossils from the Oxfordian Argiles rouges de Kheneg Formation (Tiaret, northwestern Algeria)
Mourad Belaid
; Kasdi-Merbah University, Ouargla, Algeria
Amine Cherif
; Kasdi-Merbah University, Ouargla, Algeria
Olev Vinn
; University of Tartu, Estonia
Mohammed Nadir Naimi
orcid.org/0000-0001-9787-262X
; Kasdi-Merbah University, Ouargla, Algeria
Abstract
Three main facies associations FA-3 to FA occur in the Oxfordian Argiles rouges de Kheneg Formation in northwestern Algeria. They correspond respectively to the deeper part of a mixed siliciclastic-carbonate shelf, upper shoreface and offshore transition-lower offshore. The trace fossil association of the Argiles rouges de Kheneg Formation contains fifteen ichnogenera and is moderately diverse for the Upper Jurassic. The formation contains diverse and abundant deep water or dominantly deep water trace fossils (i.e. Belorhaphe, Chondrites, Helminthopsis, Nereites, Megagrapton). They indicate that a part of the formation was deposited in offshore transition to lower offshore environments.
Keywords
Oxfordian; Kheneg; Algeria; Trace fossil; Offshore
Hrčak ID:
242167
URI
Publication date:
26.6.2020.
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