Late Albian–Coniacian planktic foraminifera and biostratigraphy of the northeastern Caucasus

Cenomanian–Campanian (Late Cretaceous) planktonic assemblages of the Crimea–Caucasus area: Palaeoceanography, palaeoclimate and sea level changes

“…At the same time, in the Caucasus successions, this species occurs consistently (Tur et al, 2001; A C C E P T E D M A N U S C R I P T (1966), which is the equivalent of the Praeglobotruncana gigantea Zone, includes the interval from the last occurrence of Rotalipora cushmani to the first occurrence of Helvetoglobotruncana helvetica (assemblages "b" and "c" in Fig. 6).…”

“…1), but only in thin sections (Fisher et al, 2005). At the same time H. helvetica is invariably present in the successions of the northern Caucasus (Maslakova, 1978;Tur, 1996;Tur et al, 2001;Kopaevich, 2010). The identification of the first occurrence of H. helvetica is often a problem as the transitional forms of H. praehelvetica and H. helvetica can also be difficult to determine (see Huber and Petrizzo, 2014).…”

“…The evolution of planktonic foraminifera from the Cenomanian to the Campanian is characterized by an increase in species diversity and morphological complexity (Bandy, 1953(Bandy, , 1961Bolli, 1959;Borsetti, 1962;Maslakova, 1978;Caron, 1985;Gorbachik, 1986;Krasilov, 1986;Sliter, 1995, 1999;Hart, 1999 (1978), Samyshkina (1983), Plotnikova in Astakhova et al (1984), Tur (1996), Tur et al (2001), Korchagin, 2001;Kopaevich (2009), and Korchagin et al (2012). The Albian-…”

Inoceramid and foraminiferal record and biozonation of the Turonian and Coniacian (Upper Cretaceous) of the Mangyshlak Mts., western Kazakhstan

“…Marginotruncana sinuosa, claimed as a good proxy for the base of the Coniacian (Walaszczyk and Peryt 1998) appears, e.g. in the northeastern Caucasus (Tur et al 2001), already in the upper Upper Turonian. The FO of Marginotruncana renzi (Gandolfi) documented from the base of the Cremnoceramus waltersdorfensis Zone in the Voronez high (central part of the East European Platform, Walaszczyk et al 2004) appears distinctly earlier in other regions (Walaszczyk and Peryt 1998;Walaszczyk et al 2010).…”

Recovery of ostracods in Cretaceous dolomitic carbonate: The efficiency of acetolysis

“…Glacial acetic acid (or pure acetic acid) was also used for the extraction of foraminifera, radiolarians and other calcified microfossils in studies by Tur et al (2001) and Kariminia (2004). Nielsen and Jakobsen (2004) used acetic acid with boiling water in rocks such as white chalk and other sedimentary carbonates.…”