Climate-controlled mass extinctions, facies, and sea-level changes around the Devonian–Carboniferous boundary in the eastern Anti-Atlas (SE Morocco)

Local overprints on the global carbonate δ13C signal in Devonian–Carboniferous boundary successions of South China

“…Current data and hypotheses support a prolonged, multi-causal nature of the Hangenberg Crisis, which lasted from the onset of deposition of the Hangenberg Black Shale (HBS) in the latest Devonian into the earliest Carboniferous (Kaiser et al, 2008(Kaiser et al, , 2011. This crisis eliminated about 21% of marine invertebrate genera, such as ammonoids, conodonts, trilobites, and corals, which were clades that did not recover until the early Tournaisian (Sepkoski, 1996).…”

“…The Hangenberg Extinction (HE) is thought to have been due to ecological effects associated with atmospheric CO 2 drawdown, such as ocean anoxia caused by marine eutrophication, global cooling, climatic instability, and glacio-eustatic fluctuations (Algeo and Scheckler, 1998;Sandberg et al, 2002;Kaiser et al, 2008). Following the HE and HBS events, a major eustatic sea-level fall known as the Hangenberg Regression (HR) occurred during the upper Middle S. praesulcata Zone (Kaiser et al, 2011;Marynowski et al, 2012), which was globally synchronous and of short duration. This eustatic event is widely evidenced by development of an unconformity in neritic successions and by deposition of regressive sandstones in cratonic seas, e.g., in Russia (Byvsheva et al, 1984), Germany (Bless et al, 1992), South China (Muchez, 1996), Morocco (Becker et al, 2002) and North America (Algeo et al, 2007).…”

Upper and uppermost Famennian (Devonian) brachiopods from north-western France (Avesnois) and southern Belgium

“…1), brachiopods are abundant in an 80 cmthick calcareous sandstone bed (bed 104; see log (section Huy 15) in Austin et al, 1970 andDenayer et al, 2015) which has been correlated with the Hangenberg Sandstone (e.g. Kaiser et al, 2011) by Mottequin & Poty (2014). This bed includes several horizons rich in dissociated valves of orthotetides, productides (chonetidines and productidines), rhynchonellides (Araratella moresnetensis) and spiriferides (e.g.…”

“…Brice et al (2013) recently stressed that the brachiopod data related to the uppermost Famennian of the Avesnois (north-western France) ( Fig. 1), which is the historical type area of the Strunian , strongly need to be updated in order to detail the consequences of the Hangenberg Crisis (Kaiser et al, 2011(Kaiser et al, , 2015. In this area, the last comprehensive study on uppermost Famennian brachiopods dates back to Dehée (1929).…”

Middle and uppermost Famennian (Upper Devonian) bryozoans from southern Belgium

“…The Famennian was indeed marked, at its base, by the post-Kellwasser recovery and, at its top, by the Hangenberg Event that took place just below the Devonian-Carboniferous boundary (e.g. Kaiser et al 2011).…”