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Mangroves are important carbon-rich biomes, but their long-term impact on the global carbon cycle is relatively unknown. Here, the authors show that the Oligo–Miocene mangroves in the South China Sea stored in excess of 4,000 Gt, demonstrating the long-term impact of mangroves on carbon storage.
While a number of subglacial lakes have been discovered beneath the modern Antarctic ice sheet, little is known regarding their prevalence during past glaciations. Here, Kuhn et al. present sedimentological evidence for an active palaeo-subglacial lake in Pine Island Bay during the last glaciation.
It has been previously assumed that deep river channels could not have developed in the Proterozoic due to lack of vegetation. Here, the authors present remote sensing and outcrop data to show that large scale and deeply channelled river networks did exist in the Proterozoic despite the absence of vegetation.
Oceanic shield volcanoes flank failures can generate large tsunamis. Here, the authors provide evidence that two tsunamis impacted the coast of Tenerife 170 Ma, the first generated by volcano flank failure and the second following a debris avalanche of the edifice during an on-going ignimbrite-forming eruption.
The Cambrian evolution of burrowing species is thought to have facilitated sediment mixing. However, sediment fabrics suggest that bioturbation remained insignificant until the appearance of more efficient sediment mixers in the Silurian.
Temporal variations in coarse river deposits are often attributed to climate change. Cosmogenic nuclide concentrations of river cobbles suggest that climate plays a subordinate role to earthquake-induced landslides in producing coarse sediments in arid Peru.