Tungsten (W), a hard, heat-resistant, and corrosion-resistant metal, is indispensable to modern high-tech industries—from ...

A geologic cross section of the Grand Canyon, described along the Trail of Time, includes the following layers from youngest to oldest: ...

To explore the sedimentary environment and the background of the source area of organic-rich shales in the Wufeng–Longmaxi Formations in the northern Sichuan Basin, samples from Well XX1 in the area ...