A new short paper with free pdf:
Free pdf:
...U-Pb chemical abrasion-isotope dilution-isotope ratio mass spectrometry (CA-ID-IRMS) dating technique with a typical analytical precision <0.05% [date] single zircons from volcanic tuff layers collected from the top (CY18-20), middle (CY17-17) and bottom (CY17-18 and CY17-9) of the Yixian Formation in the Jin-Yang basin (Fig. 1C) [and] tightly constrain its absolute age and duration.
...
[N]ew ages collectively provide very tight constraints on the onset at 125.755 Â 0.061 Ma (CY17-9) and termination at 124.122 Â 0.048 Ma (CY18-20) of the Yixian Formation, respectively, bracketing its duration to 1.633 Â 0.078 Myr.
...
The fossil preservation in the LJT Unit is often referred to as "Chinese Pompeii' for dinosaurs and other fossils due to rapidly deposited catastrophic pyroclastic flows. [N]ew age constraints with the extraordinarily short duration of LJT Unit <71 Â 86 Kyr, support this sudden nature of the deposition event(s) that [preserve] fossils in three-dimensional structures with gestures.