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One problem with argon-argon dating has been a slight discrepancy with other methods of dating.) reports that a correction of 0.65% is needed.Thus the Cretaceous–Paleogene extinction (when the dinosaurs died out) - previously dated at 65.0 or 65.5 million years ago - is more accurately dated to 66.0 Ma.Here in the Argon Geochronology Laboratory at Oregon State University (OSU) we have been employing this dating method ever since 1977 with a focus on volcanism in both the marine and terrestrial environment to improve the geochronology of the ocean crust, ocean island volcanism, large igneous provinces, lunar and planetary rocks, hydrothermal minerals and clays, and so on …Ar radiometric methods has a long history at the College of Earth, Ocean and Atmospheric Sciences (CEOAS).In 1969 the first Reynolds-design mass spectrometer was installed by Prof.David Tilles to undertake age determinations on lunar samples returned by the Apollo missions. Jack Dymond arrived at OSU to establish K/Ar dating in our Argon Geochronology Laboratory as well as noble gas geochemistry on terrestrial rocks. Robert Duncan joined the CEOAS faculty and took over the role of principal investigator for the geochronology facility, while focusing efforts toward Ar dating of crustal rocks in the ocean basins.We don our future-specs to reveal both the best smartglasses on the market and the upcoming devices we believe have the potential to take connected specs mainstream in the next five years - check them out below.The first Holo Lens is the grandaddy of augmented reality smartglasses, but there were some big problems with it that got worse as alternatives cropped up.
It's not just about slapping a camera on your face, either.In the summer of 2014 the MAP 215-50 Mass Spectrometer was dismantled in order to be replaced by a second ARGUS VI Mass Spectrometer funded by the Vetlesen Foundation, CEOAS and the Research Office of OSU. This second setup is expected to be fully operational in April 2015. It was a bit uncomfortable to wear and the field of view was narrow. The field of view is double the size of the original, and there are now eye-tracking sensors that can be used for both authentication and tuning that AR goodness.There's also better hand gesture support, so that you can do more than just pinch.