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Introduction
Publications
Publications (13)
The abrupt warming events punctuating the Termination 1 (about 11.7–18 ka Before Present, BP) were marked by sharp rises in the concentration of atmospheric methane (CH4). The role of permafrost organic carbon (OC) in these rises is still debated, with studies based on top‐down measurements of radiocarbon (¹⁴C) content of CH4 trapped in ice cores s...
Climate change is rapidly modifying tundra vegetation productivity and composition in the Arctic. However, empirical long-term evidence of this process is lacking due to field measurement limitations and problematic interpretation of the greening vs. browning from satellite data. Here, we measured plant-derived biomarkers from an Arctic fjord sedim...
Group I mesophilic Thaumarchaeota fix dissolved inorganic carbon (DIC), accompanied by a biosynthetic fractionation factor of ~20‰. Accordingly, the δ13C signature of their diagnostic biomarker crenarchaeol was suggested as a potential δ13CDIC proxy in marine basins if input from nonmarine Thaumarchaeota is negligible. Semi-enclosed basins are sens...
In the late Miocene, the Mediterranean Basin became a restricted basin because of its progressive tectonic isolation from the Global Ocean. The almost complete halt of the Atlantic-Mediterranean water exchange about 6 Ma ago triggered the deposition of the Mediterranean Salt Giant during the Messinian salinity crisis (MSC; 5.97-5.33 Ma). The enviro...
Il Miocene superiore (11,6 - 5,33 Ma) rappresenta il periodo di tempo in cui il Mediterraneo ha assunto il suo attuale carattere di bacino ristretto, a causa del quasi completo isolamento tettonico dagli Oceani. L’acme del restringimento del bacino fu raggiunta circa 6 milioni di anni fa, quando lo scambio con l’Oceano Atlantico venne fortemente ri...
During Messinian time, the Mediterranean underwent hydrological modifications culminating 5.97 Ma ago with the Messinian salinity crisis (MSC). Evaporite deposition and alleged annihilation of most marine eukaryotes were taken as evidence of the establishment of basin-wide hypersalinity followed by desiccation. However, the palaeoenvironmental cond...
The environmental conditions under which the youngest Salt Giant of our Planet-the late Messinian Mediterranean Salt Giant-formed are debated to date, since most evaporites are buried beneath the modern Mediterranean seafloor and the accessible marginal successions contain scarce or no body fossils. To shed light on the environmental conditions cha...
Since the discovery of the late Miocene (Messinian) Mediterranean Salt Giant more than 50 years ago, the environmental conditions that caused its formation have been debated. Such reconstruction suffers from the absence of modern analogues, the lack or scarcity of fossils (calcareous plankton and benthos, but also pollens), and the inaccessibility...
The youngest and one of the largest saline deposits of Earth history formed in the Mediterranean during the
Messinian salinity crisis (MSC; 5.97–5.33 Ma, Late Miocene), when global climate was experiencing a trend of
cooling and aridification. However, recent paleoclimate reconstructions indicate strong climate gradients across
the Mediterranean Ba...
In marginal Mediterranean sub-basins, the early phase of the Messinian salinity crisis (MSC) is recorded by cyclic successions of gypsum and shales, which in deeper parts of the sub-basins make lateral transition into organic-rich shales, marls, and carbonates. The cyclic stacking pattern of the gypsum-bearing sequences is assumed to reflect period...
During the Messinian salinity crisis (MSC; 5.97-5.33 Ma) the progressive isolation of the Mediterranean Sea from the Atlantic Ocean led to the establishment of extreme environmental conditions, including hypersalinity, dysoxia and anoxia. Generally, in marginal shallow basins the advent of the MSC is marked by the deposition of primary massive gyps...
In basins with deep to intermediate water depths, the progressive restriction of the gateway(s) connecting the Atlantic Ocean with the Mediterranean Sea during the Messinian salinity crisis (MSC) is recorded by organic-rich sediments, which are thought to represent the deep water counterpart of primary evaporites in shallow basins. The deposition o...
