Abstract
Three main facies associations FA-3 to FA occur in the Oxfordian Argiles rouges de Kheneg Formation in northwestern Algeria. They correspond respectively to the deeper part of a mixed siliciclastic-carbonate shelf, upper shoreface and offshore transition-lower offshore. The trace fossil association of the Argiles rouges de Kheneg Formation contains fifteen ichnogenera and is moderately diverse for the Upper Jurassic. The formation contains diverse and abundant deep water or dominantly deep water trace fossils (i.e. Belorhaphe, Chondrites, Helminthopsis, Nereites, Megagrapton). They indicate that a part of the formation was deposited in offshore transition to lower offshore environments.
Highlights
Tropical Mesozoic carbonate platform successions in the peri-Adriatic region (Figs. 1A, B) are characterized by a hiatus that encompasses the Cretaceous–Palaeogene (K–Pg) boundary (EBERLI et al, 1993; BOSELLINI et al, 1999; VLAHOVIĆ et al, 2005; KORBAR, 2009), there are rare outcrops characterized by a more or less continuous record of the stratigraphic interval of global interest (KORBAR, 2019, and references therein)
Korbar et al.: Maastrichtian to Palaeocene and Eocene pelagic carbonates on the island of Svetac apirs outcropped presumably during the Miocene (PIKELJ et al, 2015), and are still growing (GELETTI et al, 2008; BABIĆ et al, 2012)
The discovery of pelagic carbonates on the island of Svetac is important for the reconstruction of the latest Cretaceous to Palaeogene palaeogeography of the central Adriatic area
Summary
Tropical Mesozoic carbonate platform successions in the peri-Adriatic region (Figs. 1A, B) are characterized by a hiatus that encompasses the Cretaceous–Palaeogene (K–Pg) boundary (EBERLI et al, 1993; BOSELLINI et al, 1999; VLAHOVIĆ et al, 2005; KORBAR, 2009), there are rare outcrops characterized by a more or less continuous record of the stratigraphic interval of global interest (KORBAR, 2019, and references therein). Because of a regional emergence of the platform during the Late Cretaceous into the Palaeogene, and the related hiatus within the succession, only a few exceptional localities from the central part of the Adriatic Carbonate Platform sensu stricto (ACP cf KORBAR, 2009) are charac terized by a more or less continuous sedimentary record across the K–Pg boundary. This boundary is marked within the sections by a deposit which is a few centimetres to a few metres thick, interpreted as the K–Pg tsunamite (KORBAR et al, 2015, 2017a)
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