Larger Benthic Foraminifera of Florida and the Eocene Oligocene Transition

Cotton, Laura; Bryan, Jon; Eder, Wolfgang; Means, Harley; Monechi, Simonetta

doi:10.1130/abs/2017am-306177

Cited by 2 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…5). S. stefaninii displays a wider distribution than D. aydimi with additional reports from Tanzania (Cotton, 2012), Somalia (Silvestri, 1939), and wide distanced from there, Zakynthos Island of Greece (Di Carlo and Pignatti, 2009). The spatial distributional pattern of D. aydimi reflects a faunal provincialism of the Dictyoconinae for the Arabian Plate reported already from the Cenomanian (e.g., Henson, 1948;Bernaus and Masse, 2006;Schlagintweit and Rashidi, 2017, tab.…”

Section: Remarks On Palaeobiogeographymentioning

confidence: 98%

“…These Somalina wacke-/floatstones were clearly dominated by porcelaneous taxa and were interpreted as an internal infralittoral environment, like the Eocene "Spirolina facies" of the Adriatic Carbonate Platform (see Vecchio and Hottinger, 2007, Figure 5). S. stefaninii displays a wider distribution than D. aydimi, with additional reports from Tanzania (Cotton, 2012), Somalia (Silvestri, 1939), and far from there, the Zakynthos Island of Greece (Di Carlo and Pignatti, 2009). The spatial distributional pattern of D. aydimi reflects a faunal provincialism of the Dictyoconinae for the Arabian Plate reported previously from the Cenomanian (e.g., Henson, 1948;Bernaus and Masse, 2006;Schlagintweit and Rashidi, 2017, Table 1; Schlagintweit and Yazdi-Moghadam, 2020;Yazdi-Moghadam and Schlagintweit, 2020) and Maastrichtian (Schlagintweit et al, 2016).…”

Section: Systematic Descriptionmentioning

confidence: 99%

See 1 more Smart Citation

Dictyoconus aydimi (Gallardo-Garcia and Serra-Kiel, 2016) comb. nov., larger benthic foraminifera from the Middle-Upper Eocene of the Middle East (SE Turkey, Iraq, SW Iran, Oman): New evidence for Arabian Plate faunal provincialism

Özgen-Erdem¹,

Schlagintweit²,

Sinanoğlu³

2021

Turkish J Earth Sci

View full text Add to dashboard Cite

IntroductionLarger agglutinated conical benthic foraminifera are a typical constituent of Paleogene inner platform carbonates (e.g., Hottinger and Drobne, 1980;Vecchio and Hottinger, 2007;Powell, 2010). As in the Lower and Upper Cretaceous (e.g., Cherchi et al., 1981), the representatives of the Dictyoconinae displayed a biogeographic distribution pattern during the Paleogene with different assemblages on both sides of the Atlantic Ocean (e.g., Carribean Bioprovince, Hottinger and Drobne, 1980; Goldbeck and Langer, 2009, Figure 27) for this group of agglutinated conical foraminifera. Paleocene taxa (e.g., Coskinon, Dictyoconus, Fallotella, and Karsella) have been reported from the Taurides of Turkey (provinces of Elazığ and Kars) (e.g., Sirel, 2015). Assemblages of Middle Eocene (Bartonian) larger benthic foraminifera (LBF), including Orbitolinidae, have been studied from the Hoya Formation in SE Turkey (north eastern Diyarbakır), belonging to the northernmost part of the Arabian Plate (Özgen-Erdem and Sinanoğlu, 2016;Sallam et al., 2018). Large-sized dictyoconids, previously referred to as Dictyoconus aegyptiensis (Chapman), usually occur above limestones with Somalina stefaninii Silvestri. They have been recognized as Rogerella aydimi Gallardo-Garcia and Serra-Kiel, as described recently in Serra-Kiel et al. (2016), from the Middle-Upper Eocene of Oman. The present findings from Turkey represent the first discovery of its type-locality. The aim of the present study was to 1) comment and revise its taxonomic status and 2) constrain its paleobiogeographic distribution, also including further specimens from the Jahrum Formation in Iran. Geological setting 2.1. Geological overviewThe south eastern Anatolian region forms the northern part of the Arabian Platform (Figure 1A) and consists of the Bitlis-Pütürge Crystalline Melange, Precambrian Basement, and Early Paleozoic-Cenozoic sedimentary deposits (Rigo de Righi and Cortesini, 1964;Sungurlu, 1974;Şengör and Yılmaz, 1981). The geological framework of this region was shaped by the Late Mesozoic and Cenozoic closure of the multibranched Neotethyan Ocean (Şengör and Yılmaz, 1981). Important folding structures developed during the Neotectonic period as a result of the N-trending compressional tectonic regime. The Cambrian, Aptian-Cenomanian, Campanian-Maastrichtian, and Middle Eocene periods are represented by marine sequences, which indicate widespread transgression Abstract: Rogerella aydimi Gallardo-Garcia and Serra-Kiel was described from the Priabonian Haluf Member of the Aydim Formation, Oman. Based on new finds from the Bartonian Hoya Formation of SE Turkey and the Jahrum Formation of Iran, its taxonomic status is discussed herein. It is concluded that it represents a species of Dictyoconus with a simple subepidermal network (1 rafter, 1 intercalary beam) below a thin epiderm. The stratigraphic range of D. aydimi known thus far is Bartonian-Priabonian or Shallow Benthic Zone 17-20. The distribution of D. aydimi gives further evidence for a Middle-Late Eocene ...

show abstract

Section: Remarks On Palaeobiogeographymentioning

confidence: 98%

Section: Systematic Descriptionmentioning

confidence: 99%

Dictyoconus aydimi (Gallardo-Garcia and Serra-Kiel, 2016) comb. nov., larger benthic foraminifera from the Middle-Upper Eocene of the Middle East (SE Turkey, Iraq, SW Iran, Oman): New evidence for Arabian Plate faunal provincialism

Özgen-Erdem¹,

Schlagintweit²,

Sinanoğlu³

2021

Turkish J Earth Sci

View full text Add to dashboard Cite

show abstract

“…The equatorial and axial orientation of larger foraminifera thin section samples (foraminifera images fromCotton, 2012).…”

mentioning

confidence: 99%

Liberating microfossils from indurated carbonates: comparison of three disaggregation methods

Beasley

Parvaz²,

Cotton

et al. 2020

J. Micropalaeontol.

View full text Add to dashboard Cite

Abstract. Three disaggregation methods, i.e. Calgon, acetic acid and electric pulse fragmentation (EPF), have been applied to a range of heavily lithified, carbonate-rich sedimentary rock samples of Paleogene age. Samples are predominantly from the carbonate-rich, shallow water domain (<250 m palaeo-water depth) of Tanzania, Malta and the United Arab Emirates (Paleogene Tethys Ocean). The effectiveness and efficiency of each method has been compared, in addition to the preservation of the resultant liberated microfossil material (primarily larger foraminifera; LF). Of the three methods, the most efficient and effective was EPF, which liberated the largest number of LF in a very short processing time and resulted in the best preservation. Samples with calcitic, silicic, and clay matrices and cements were successfully disaggregated using EPF. In this study, recovered microfossils were largely >500 µm, suggesting this technique may be more appropriate for liberating larger microfossils (e.g. LFs); however, we discuss nuances to the method that would allow for more effective recovery of smaller microfossil specimens. The more traditional acetic acid method was also able to disaggregate a number of the samples; however, preservation of the LF was compromised. We suggest a best-practice methodology for implementing EPF in micropalaeontological studies.

show abstract

Larger Benthic Foraminifera of Florida and the Eocene Oligocene Transition

Cited by 2 publications

References 0 publications

Dictyoconus aydimi (Gallardo-Garcia and Serra-Kiel, 2016) comb. nov., larger benthic foraminifera from the Middle-Upper Eocene of the Middle East (SE Turkey, Iraq, SW Iran, Oman): New evidence for Arabian Plate faunal provincialism

Dictyoconus aydimi (Gallardo-Garcia and Serra-Kiel, 2016) comb. nov., larger benthic foraminifera from the Middle-Upper Eocene of the Middle East (SE Turkey, Iraq, SW Iran, Oman): New evidence for Arabian Plate faunal provincialism

Liberating microfossils from indurated carbonates: comparison of three disaggregation methods

Contact Info

Product

Resources

About