Now showing items 1-10 of 243
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 ...
Stable vanadium isotopes as a redox proxy in magmatic systems
(2016-10-26) - Journal article,
Recycling pathways of multivalent elements, that impact our understanding of diverse geological processes from ore formation to the rise of atmospheric oxygen, depend critically on the spatial and temporal variation of ...
The isotope geochemistry of zinc and copper
(2017-01-31) - Journal article,
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 ...
Modeling the Signature of Sulfur Mass-Independent Fractionation produced in the Archean Atmosphere
(2014-09-15) - Journal article,
Minor sulfur isotope anomalies indicate the absence of O2 from the Archean atmosphere. A rich dataset showing large variations in magnitude and sign of Δ33S and Δ36S, preserved in both sulfates and sulfides, suggests that ...
Proterozoic onset of crustal reworking and collisional tectonics : Reappraisal of the zircon oxygen isotope record
(2014-05) - Journal article,
A global U-Pb and δO zircon database shows temporal changes in the magmatic record related to changes in the degree of crustal reworking. The δO composition of bulk sediment remains relatively constant through geologic ...
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 ...