The first microbialite - coral mounds in the Cenozoic (Uppermost Paleocene) from the Northern Tethys (Slovenia): Environmentally-triggered phase shifts preceding the PETM?

Global microbial carbonate proliferation after the end-Devonian mass extinction: Mainly controlled by demise of skeletal bioconstructors

“…52. The ranges of the skeleton- and microbe-dominated bioconstructions are drawn based mainly on the Palaeoreefs database18 and this study (Supplementary Tables 1 and 3), and new data for the end-Ordovician transition636, D-C transition2353, end-Permian transition202138, end-Triassic transition7822 and end-Cretaceous transition19.…”

“…Lastly, using the Paleoreefs database of Kiessling et al 18. and new, recently published data6781920212223, the relative abundance of skeleton- and microbe-dominated bioconstructions during the ‘Big Five’ and Hangenberg mass extinction transitions, was systematically reviewed, in order to compare the relationship between skeletal and microbial bioconstructors across the different mass extinction events. Hence, this paper aims to unravel (1) changes in the marine biosphere across the end-Devonian mass extinction transition; and (2) the dominant controlling factor on microbial carbonate proliferation after mass extinctions more generally.…”

The Paleocene-Eocene thermal maximum (PETM) in shallow-marine successions of the Adriatic carbonate platform (SW Slovenia)

“…The relative contribution of each of these processes, however, is diffi cult to quantify, even in modern environments Walter, 1994a, 1994b). In the case of the Adriatic carbonate platform, the deposition of the studied sections occurred in a ramp setting, probably characterized by strong current activity (Zamagni et al, 2008(Zamagni et al, , 2009. Wave-and current-driven exchange between the open sea and the shallow, neritic sea likely limited the restriction of the water masses.…”

“…1B), which overlies the forebulge unconformity and consists of three formations: (1) the Liburnian Formation (Upper Maastrichtian to Lower Paleocene), characterized by restricted, marginal marine and paralic carbonates; (2) the Trstelj Formation (Upper Paleocene), composed of a lower member dominated by foraminiferal limestones, and an upper member including foralgal/coralgal limestones and microbialite-coral mounds; and (3) the Alveolina-Nummulites Limestone (Lower Eocene), dominated by accumulations of larger benthic foraminifera (Zamagni et al, 2008(Zamagni et al, , 2009 (Fig. 1B).…”

“…The Čebulovica section is almost twice the thickness of the Kozina section. This difference is related to a combination of factors, including different positions along the ramp profi le, with a higher rate of sediment accumulation in the midramp compared to the inner ramp (e.g., Pomar, 2001), different carbonate production types, with development of microbialitecoral mounds in the midramp settings (Zamagni et al, 2009), possible local differences in subsidence rates, and/or paleotopography.…”