D
Daniel J. Condon
Researcher at British Geological Survey
Publications - 120
Citations - 12904
Daniel J. Condon is an academic researcher from British Geological Survey. The author has contributed to research in topics: Geochronology & Zircon. The author has an hindex of 42, co-authored 116 publications receiving 10429 citations. Previous affiliations of Daniel J. Condon include Massachusetts Institute of Technology & Natural Environment Research Council.
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Plesovice zircon : A new natural reference material for U-Pb and Hf isotopic microanalysis
Jirri Slama,Jirri Slama,Jirri Slama,Jan Košler,Daniel J. Condon,James L. Crowley,Axel Gerdes,John M. Hanchar,Matthew S.A. Horstwood,George A. Morris,Lutz Nasdala,Nicholas Norberg,Urs Schaltegger,Blair Schoene,Michael Tubrett,Martin J. Whitehouse +15 more
TL;DR: The Plesovice zircon as discussed by the authors has a concordant U-Pb age with a weighted mean Pb-206/U-238 date of 337.13 +/- 0.37 Ma (ID-TIMS, 95% confidence limits, including tracer calibration uncertainty).
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U-Pb ages from the neoproterozoic Doushantuo Formation, China
TL;DR: U-Pb zircon dates from volcanic ash beds within the Doushantuo Formation (China) indicate that its deposition occurred between 635 and 551 million years ago, indicating synchronous deglaciation.
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Fossil steroids record the appearance of Demospongiae during the Cryogenian period
Gordon D. Love,Gordon D. Love,Emmanuelle Grosjean,Charlotte Stalvies,David A. Fike,John P. Grotzinger,Alexander S. Bradley,Amy E. Kelly,Maya P. Bhatia,Will Meredith,Colin E. Snape,Samuel A. Bowring,Daniel J. Condon,Daniel J. Condon,Roger E. Summons +14 more
TL;DR: It is suggested that shallow shelf waters in some late Cryogenian ocean basins contained dissolved oxygen in concentrations sufficient to support basal metazoan life at least 100 Myr before the rapid diversification of bilaterians during the Cambrian explosion.
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238U/235U Systematics in Terrestrial Uranium-Bearing Minerals
TL;DR: By accurately measuring the 238U/235U ratio in a suite of minerals representing a range of tectonic environments, Hiess et al. demonstrate that this ratio is more variable than was previously thought, highlighting the need for a revised approach to radiometric dating.
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U-Pb zircon date from the Neoproterozoic Ghaub Formation, Namibia: Constraints on Marinoan glaciation
TL;DR: In this paper, U-Pb zircon geochronology of an ash layer constrains the deposition of the glaciomarine sediments to 635.5 ± 1.2 Ma, providing an age for what has been described as a "Marinoan-type" glaciation.