Methods: Field investigations, petrology, zircon U-Pb dating, and whole-rock geochemistry. Discussion: The chronology of volcanic rocks cross different formations of the Liaohe Group exhibiting no ...

Well-fractionated peralkaline nepheline syenite has high Zr/TiO2 but there are no zircon. The diagrams of silica saturation ... and geotectonic discrimination even for altered samples of igneous rocks ...

Objective: To evaluate the possible existence of a significant correlation between quality of life and severity classification of lumbar stenosis based on dural sac morphology in outpatients. Methods: ...

Smithsonian researchers trekked to a remote site in northern Canada to collect four-billion-year-old rock samples that could ...

"Dating zircon grains using ... techniques is now celebrated as the optimal method for determining when igneous rocks formed," the report said. The technique involves measuring the decay of ...