Vestiges of atoll-like formations in the Lower Cretaceous of the Mecsek Mountains, Hungary

A unique Valanginian paleoenvironment at an iron ore deposit near Zengõvárkony (Mecsek Mts, South Hungary), and a possible genetic model

“…The first modern synthesis of the evolution and development of the region, with special reference to the Early Cretaceous was made by Császár (1992Császár ( , 2002, who also recognized and proved the presence of former atoll-like structures (Császár and Turnšek 1996) and brought the Early Cretaceous of the Mecsek Mts into a broader context. Bércziné et al (1997) also included the Zengõvárkony area in a paleogeographic reconstruction, indicating that Zengõvárkony was in shallower environment (within the slope), although they did not mention or explain the ore formation and its genesis.…”

Asteroseris from the Bersek Marl (Gerecse Mountains, Hungary; Early Cretaceous; Anthozoa).

“…Th e major part of the Bersek Quarry comprises monotonous, grey marlstone (Bersek Marl Formation;Császár 1996). Th e thick lower part, Valanginian in age, is very poor in megafossils, whereas the upper, approximately 15 metres of the marl, is relatively rich in cephalopods.…”

“…Early Cretaceous corals from Hungary were reported mainly by Kolosváry (1954Kolosváry ( , 1957Kolosváry ( , 1959 and Császár & Turnšek (1996). Whereas the latter reference provides exact descriptions and illustrations of the material, the compilations by Ko los vá ry are less precise and give only a rough idea about Hungarian Cretaceous corals.…”

Palaeoecology of Valletia antiqua Favre in Joukowsky & Favre, 1913 (Bivalvia, Hippuritida, Diceratidae); with comments on the taxonomy and distribution of the genus Valletia

“…The specimens described by Hofmann & Vadász (1912) were collected predominantly from a single locality, i.e. Kisújbánya near Magyaregregy (Mecsek Mountains, Hungary; Czabalay 1992, Császár & Turnšek 1996. They occur in volcanoclastic conglomerates of Valanginian age (Bujtor 1993(Bujtor , 2007, where they form part of a rich allochthonous assemblage of rudist and non-rudist bivalves, gastropods, ammonites and corals (Czabalay 1992, Bujtor 1993, Császár & Turnšek 1996.…”

“…Kisújbánya near Magyaregregy (Mecsek Mountains, Hungary; Czabalay 1992, Császár & Turnšek 1996. They occur in volcanoclastic conglomerates of Valanginian age (Bujtor 1993(Bujtor , 2007, where they form part of a rich allochthonous assemblage of rudist and non-rudist bivalves, gastropods, ammonites and corals (Czabalay 1992, Bujtor 1993, Császár & Turnšek 1996. The palaeoenvironmental model presented by Császár & Turnšek (1996) attributes the rudist bivalves, including Valletia, to shallow, quiet lagoonal environments that were protected by atoll-like coral reef structures, which formed around volcanic islands.…”