Olsen Paul E. author Columbia University. Earth and Environmental Sciences Kent Dennis V. author Columbia University. Lamont-Doherty Earth Observatory Whiteside Jessica H. author Columbia University. Lamont-Doherty Earth Observatory originator text Articles 2011 English The Newark-APTS established a high-resolution framework for the Late Triassic and Early Jurassic. Palaeomagnetic polarity correlations to marine sections show that stage-level correlations of continental sequences were off by as much as 10 million years. New Uā€“Pb ages show the new correlations and the Newark basin astrochronology to be accurate. Correlation of Newark-APTS to the Chinle Formation/Dockum Group, Glen Canyon Group, Fleming Fjord Formation and Ischigualasto Formation led to the following conclusions: (1) there are no unequivocal Carnian-age dinosaurs; (2) the Norian Age was characterised by a slowly increasing saurischian diversity but no unequivocal ornithischians; (3) there was profound Norian and Rhaetian continental provinciality; (4) the classic Chinle-, Germanic- and Los Colorados-type assemblages may have persisted to the close of the Rhaetian; (5) the distinct genus-level biotic transition traditionally correlated with the marine Carnianā€“Norian is in fact mid-Norian in age and within published error of the Manicouagan impact; (6) the end-Triassic marine and continental extinctions as seen in eastern North America were contemporaneous; and (7) compared to Triassic communities, Hettangian and Sinemurian age terrestrial communities were nearly globally homogenous and of low diversity. Consequently, the complex emerging picture of dinosaur diversification demands biostratigraphically-independent geochronologies in each of the faunally-important regions. Geology Paleontology 101 3-4 201 229 2011-05 http://dx.doi.org/10.1017/S1755691011020032 http://hdl.handle.net/10022/AC:P:12397 NNC NNC 2012-01-30 14:39:15 -0500 2013-02-11 15:39:10 -0500 6394 eng