Albian Foraminifera of the Rumanian Plain

Fifteen species and three subspecies of foraminifera and forty-four species of ostracods are described from subsurface borehole Horus Well-in the northwestern desert of Egypt. The stratigraphic significance of some benthonic foraminifera (Thomasinella, Nezzazata and Nezzazatinella) furnish new information on the age determination. Cenomanian-Santonian time is suggested for the studied interval (Bahariya and Abu Roash Formations). Among the identified ostracodes, three species of Bairdia are described for the first time: B. bassiounii, B. compressa, and B. elongata. Also, one new subspecies of Nezzazata, N. convexa conica, is discussed. The identified foraminiferal species belong to 12 families:

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“…Occurrence: It was recorded in the Albian of Rumania (Neagu 1965). In the present material, it is found in sample 6600'.…”

Section: Introductionsupporting

confidence: 50%

Cenomanian-Santonian Foraminifera and Ostracodes from Horus Well-1, North Western Desert, Egypt

Ismail

Soliman

1997

Micropaleontology

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“…Some data revealed upper Aptian‐lower Albian appearance of Hedbergella planispira (Montanari & Koeberl, 2000). The latest biostratigraphic data reflect the species attributes to Early Albian time (Hu et al, 2009), whereas Neagu (2005) alluded that this taxon is not certain of the Lower Albian. However, in this study, the faunal assemblage of this zone confirms an early Late Albian to middle Late Albian age.…”

Section: Biostratigraphy Of Kazhdumi Formationmentioning

confidence: 99%

Larger benthic and planktonic biostratigraphy and facies of Albian sediments in Coastal Fars Zone (Zagros area, south‐west Iran)

et al. 2021

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A total of 64 samples were collected from the Kazhdumi Formation (Albian) of south Zagros Basin (Coastal Fars Zone) in order to study the biostratigraphy and analyse the lithofacies. Stratigraphic distribution of identified larger benthic and planktonic foraminifers has confirmed the presence of three successive biozones: Mesorbitolina subconcava‐Orbitolina discoidea Zone, Favusella washitensis Zone followed by an upper Conicorbitolina conica‐Mesorbitolina parva Zone. Generally, orbitolinids are well developed in the Albian succession in the studied section, whereas the stratigraphic distribution of planktonic foraminifers is more restricted, dominating the Favusella washitensis Zone. Nevertheless, microscopic investigation recognizes five microfacies consisting of extraclast‐foraminifer packstone, peloid‐intraclast Orbitolina wackestone, foraminiferal plankton wackestone, intraclast‐Orbitolina grainstone, and coral‐rudist wackestone, which indicated a shallow water carbonates palaeoenvironment (intertidal, lagoon, bar) and open marine. The alternation of both planktic and benthic foraminifera through the Kazhdumi Formation confirms a rapid transgression and regression in the studied section during Albian time, which is attributed to Kazerun basement fault behaviour in the mentioned time interval.

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“…The BKEO of R. micheli from the doublekeeled planispiral Bannerina banneri was demonstrated by Georgescu and Sawyer in . The earliest representatives of R. micheli present numerous chambers in the final whorl and Neagu (2005) erected the species R. moesiana mainly based on this feature; notably, this species was included in the synonymy of R. micheli in the evolutionary monograph on the rotaliporid planktic foraminifera (Georgescu, 2016). One specimen with double-keeled periphery was illustrated in the original report of this species by Sacal and Debourle (1957).…”

Section: Fig 5 Biostratigraphical Zonation Developed Herein and Cormentioning

confidence: 99%

Untitled

2017

Studia UBB Geologia

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Abstract.A high-resolution biostratigraphical zonation based on planktic foraminifera is developed for the Upper Cretaceous. It consists of twenty-five biozones defined with the aid of serial and coiled planktic foraminiferal taxa and presents the highest resolution developed with planktic foraminifera for this Series. All the index species used in biozonation are part of the practical classification associated with the evolutionary classification. The new biozonation represents a first in using data directly derived from the Theory of Evolution and its evolutionary classification extension in an application of paleontology such as biostratigraphy. By this the Theory of Evolution becomes a direct provider of data in applied studies.

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Albian Foraminifera of the Rumanian Plain

Cited by 27 publications

References 3 publications

Cenomanian-Santonian Foraminifera and Ostracodes from Horus Well-1, North Western Desert, Egypt

Cenomanian-Santonian Foraminifera and Ostracodes from Horus Well-1, North Western Desert, Egypt

Larger benthic and planktonic biostratigraphy and facies of Albian sediments in Coastal Fars Zone (Zagros area, south‐west Iran)

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