New Zircon U-Pb Age of Tuff in the Third Section of the Tuchengzi Formation: Constraints on the Jurassic-Cretaceous Boundary of Continental Strata in Western Liaoning
New Zircon U-Pb Age of Tuff in the Third Section of the Tuchengzi Formation: Constraints on the Jurassic-Cretaceous Boundary of Continental Strata in Western Liaoning