Deep in the Colombian Amazon, a team of scholars worked with Indigenous elders to interpret a 12-mile-long stretch of 11,000-year-old rock art. Researchers now believe that the art tells a ...

Different analytical methods including total organic carbon (TOC), Rock-Eval pyrolysis, and conventional biomarker ... values of oil shale samples indicate a deeper water and more reducing sedimentary ...

Rocks are categorized into three main types: igneous, sedimentary, and metamorphic. There are over 4,000 identified minerals on Earth. Common rocks include granite, basalt, limestone, and sandstone.

Its abundant outcrops, core samples, and thin section data provide advantageous conditions for sedimentary architecture studies. Based on these data, this study elucidates typical lithofacies, ...

Rosario Pete Vasquez, Blaine’s chief patrol agent, said they have installed concrete blocks and rock barriers in several high-traffic areas near the crossing. Boulders have been present along ...