Original paper

Planktic foraminifera of the Danian/Selandian transition at Jabal Mundassa, Al Ain Area, United Arab Emirates

Anan, Haidar S.

Abstract

The micropaleontological record of Jabal Mundassa (Al Ain area, United Arab Emirates, Northern Oman Mountains) indicates that the Paleocene succession bears prolific index-species of planktic foraminifera of the Danian/Selandian (D/S) transition (Early-early Middle Paleocene). The succession is considered the only outcrop with Danian sediments and the most complete Paleocene succession in UAE. Based on planktic foraminifera, the Danian age is attributed to the shaley marl sediments of the Mundassa Member (MM) of the Muthaymimah Formation (MF), nonconformably overlying the Pre-Maastrichtian allochthonus Semail Ophiolite (SO, serpentinites and serpentinized peridotites). Twenty-one planktic foraminiferal species belonging to five genera were identified from fourteen samples. The duration of the hiatus at the Cretaceous/Paleogene (K/P) boundary includes two early Danian biozones. Four Danian planktic foraminiferal biozones were recorded: Parasubbotina pseudobulloides (P1a), Subbotina triloculinoides (P1b), Globanomalina compressa/Praemurica inconstans (P1c) and Praemurica uncinata (P2). In addition, the early Selandian Morozovella angulata (P3) was recognized and rests conformably on the late Danian zone (P2). The K/P depositional gap is most probably corresponding to an interval of tectonic activity that exists in many localities. The biostratigraphy and paleogeography of the identified faunas at Jabal Mundassa and other Paleocene outcrops in the UAE and Arabia are discussed.

Keywords

arabian gulfselandianpaleoceneunited arab emiratesal ain areanorthern oman mountainsplanktic foraminiferamalaqetmundassadanian