Age constraints of Mercury's polar deposits suggest recent delivery of ice.
Sign Up to like & getrecommendations! Published in 2019 at "Earth and planetary science letters"
DOI: 10.1016/j.epsl.2019.05.027
Abstract: Surface ice at the poles of Mercury appears as several-m-thick deposits that are composed of nearly pure water. We provide new age estimates of Mercury's polar deposits from combined analyses of Poisson statistics and direct… read more here.
Keywords: mercury polar; polar deposits; age; age constraints ... See more keywords
Radiocarbon and U-series age constraints for the Lateglacial rock art of Sicily
Sign Up to like & getrecommendations! Published in 2020 at "Quaternary Science Reviews"
DOI: 10.1016/j.quascirev.2020.106524
Abstract: Abstract The presence of rock and portable art on Sicily has been recognized since World War II. This record has been unanimously attributed to the Upper Palaeolithic in the published literature, based almost uniquely on… read more here.
Keywords: art sicily; series age; age constraints; art ... See more keywords
Astronomical age constraints and extinction mechanisms of the Late Triassic Carnian crisis
Sign Up to like & getrecommendations! Published in 2017 at "Scientific Reports"
DOI: 10.1038/s41598-017-02817-7
Abstract: The geological record contains evidence for numerous pronounced perturbations in the global carbon cycle, some of which are associated with mass extinction. In the Carnian (Late Triassic), evidence from sedimentology and fossil pollen points to… read more here.
Keywords: extinction mechanisms; evidence; constraints extinction; late triassic ... See more keywords
Relative time constraints improve molecular dating.
Sign Up to like & getrecommendations! Published in 2021 at "Systematic biology"
DOI: 10.1093/sysbio/syab084
Abstract: Dating the tree of life is central to understanding the evolution of life on Earth. Molecular clocks calibrated with fossils represent the state of the art for inferring the ages of major groups. Yet, other… read more here.
Keywords: time constraints; relative time; constraints improve; relative age ... See more keywords
Direct age constraints on the magnetism of Jack Hills zircon
Sign Up to like & getrecommendations! Published in 2023 at "Science Advances"
DOI: 10.1126/sciadv.add1511
Abstract: A potential record of Earth’s magnetic field going back 4.2 billion years (Ga) ago is carried by magnetite inclusions in zircon grains from the Jack Hills. This magnetite may be secondary in nature, however, meaning… read more here.
Keywords: constraints magnetism; jack; age constraints; direct age ... See more keywords