The uppermost Albian–lower Cenomanian Bielba Formation of the type-area (Cantabria, northern Spain): facies, biostratigraphy, and benthic Foraminifera

Micropalaeontology, biostratigraphy, and depositional setting of the mid-Cretaceous Derdere Formation at Derik, Mardin, south-eastern Turkey

“…0.25-0.6 mm diameter in axial section) with a distinct proloculus (ca. 0.05 mm in diameter), comparable with the small forms described by Rosales and Schlagintweit (2015) (Hamaoui, 1985a;Velić, 2007). It was recognised (along with Nezzazata conica (Smout)) within the lower half of the Derdere Formation by Özkan and Altıner (2019).…”

“…10.5). This species has been recently redescribed by Piuz and Meister (2013), based on material from Oman and Morocco, and by Rosales and Schlagintweit (2015), based on material from Spain. In the Natih Formation of Oman, it occurs in beds of Cenomanian age.…”

“…The specimens illustrated by Özkan and Altıner (2019) as "Hensonina lenticularis" are poorly preserved, and difficult to identify with any confidence, but appear to conform better with T. lenticularis sensu Henson (1947) and Arnaud-Vanneau et al (1988). This species can range into the Cenomanian and was recently placed in the new genus Hensonipapillus by Schlagintweit et al (2015) (see also Rosales and Schlagintweit, 2015). Finally, Özkan and Altıner (2019) mention (but do not illustrate) the occurrence of P. infracretacea in the lowermost Derdere Forma-tion.…”

“…Van Buchem et al (2011) reported that K120 MFS is of early Cenomanian age, with its highstand extending into the early middle Cenomanian. K130 MFS is of middle Cenomanian age with an associated underlying distinctive sequence boundary (SB) within the early part of the middle Cenomanian (see also van Buchem et al 1996;Schulze et al, 2003Schulze et al, , 2004Schulze et al, , 2005Bauer et al, 2003;Homewood et al, 2008;Saber et al, 2009;Razin et al, 2010;Hajikazemi et al, 2010;Grélaud et al, 2010;Hollis, 2011;Ghanem et al, 2012;Rahimpour-Bonab et al, 2012;Ghanem and Kuss, 2013;Wilmsen and Nagm, 2013;Assadi et al, 2016, for examples of this event across the Arabian Plate). Correlation with the global mid-Cenomanian sea level low (Hancock, 2004;Gale et al, 2008) and 95.5 Ma sequence boundary of Haq (2014) seems likely.…”

“…If the Derdere Formation does not extend into the Turonian, as seems likely from the data presented by Mülayim et al (2019a), there are contrasts with other mid-Cretaceous carbonate platform successions elsewhere on the Arabian Platform. For example, in Jordan (Schulze et al, 2003(Schulze et al, , 2004(Schulze et al, , 2005, Sinai (Bauer et al, 2003;Saber et al, 2009), Kuwait Al-Rifaiy, 1973), Lebanon (Saint-Marc, 1974), the Iranian Zagros (e.g. Rahimpour-Bonab et al, 2012;Vincent et al, 2015;Navidtalab et al, 2019;Kalanat and Vaziri-Moghaddam, 2019), and Oman (Droste and van Steenwinkel, 2004;Homewood et al, 2008;Wohlwend et al, 2016), there is reasonable evidence for Turonian carbonate platform deposition.…”