Now showing items 1-10 of 249
Challenging the sensitivity limits of paleomagnetism : magnetostratigraphy of weakly magnetized Guadalupian-Lopingian (Permian) limestone from Kyushu, Japan
(2015-01-15) - Journal article,
Despite their utility for bio- and chemostratigraphy, many carbonate platform sequences have been difficult to analyze using paleomagnetic techniques due to their extraordinarily weak natural remanent magnetizations (NRMs). ...
Not so non-marine? Revisiting the Stoer Group and the Mesoproterozoic biosphere
(2017-06-13) - Journal article,
The Poll a’Mhuilt Member of the Stoer Group (Torridonian Supergroup) in Scotland has been heralded as a rare window into the ecology of Mesoproterozoic terrestrial environments. Its unusually high molybdenum concentrations ...
Quantitative modeling of the rise in atmospheric oxygen
(University of Washington, 2008-08-01) - Other,
The abrupt rise of molecular oxygen in Earth’s atmosphere approximately 2.4 billion years ago was perhaps the most profound event in Earth’s history after the evolution of life itself. Biogeochemical cycles in Earth’s ...
The need for laboratory work to aid in the understanding of exoplanetary atmospheres
(Nexus for Exoplanet System Science (NExSS), 2016-02-23) - Working or discussion paper,
Advancements in our understanding of exoplanetary atmospheres, from massive gas giants down to rocky worlds, depend on the constructive challenges between observations and models. We are now on a clear trajectory for ...
Marine science : making waves
(2014-06) - Journal item,
Detrital zircon geochronology of the Grenville/Llano foreland and basal Sauk Sequence in west Texas, USA
(2014-07-01) - Journal article,
U-Pb detrital zircon ages from Mesoprotero zoic and Cambrian siliciclastic units in west Texas (USA) constrain the depositional setting, provenance, and tectonic history of the region within a late Mesoproterozoic Grenville ...
The future of the northeast Atlantic benthic flora in a high CO2 world
(2014-07) - Journal article,
Seaweed and seagrass communities in the northeast Atlantic have been profoundly impacted by humans, and the rate of change is accelerating rapidly due to runaway CO2 emissions and mounting pressures on coastlines associated ...
Multiple Palaeoproterozoic carbon burial episodes and excursions
(2015-08-15) - Journal article,
Abstract Organic-rich rocks (averaging 2–5% total organic carbon) and positive carbonate-carbon isotope excursions ( δ 13C > + 5‰ and locally much higher, i.e. the Lomagundi-Jatuli Event) are hallmark features of ...
The glacial mid-depth radiocarbon bulge and its implications for the overturning circulation
(2015) - Journal article,
Published reconstructions of radiocarbon in the Atlantic sector of the Southern Ocean indicate that there is a mid-depth maximum in radiocarbon age during the last glacial maximum (LGM). This is in contrast to the modern ...
Crustal growth during island arc accretion and transcurrent deformation, Natal Metamorphic Province, South Africa : new isotopic constraints
(2015-08) - Journal article,
The Natal Metamorphic Province consists of, from north to south, the Tugela, Mzumbe, and Margate terranes. These were accreted to the southeastern margin of the Kaapvaal Craton in the late Mesoproterozoic, and followed by ...