Sublithospheric diamonds: Plate tectonics from Earth's deepest samples (Annual Reviews, 2024)
✦ Outcrop of Sudbury Breccia, Sudbury ON, Canada. This unique textured breccia, also known as 'pseudotachylite', was produced by the giant meteorite impact that produced the Subdbury Complex 1849 million years ago. The breccia was formed when the shock wave produced by the impact granulated, fluidized, and partially melted the country rock surrounded and carried larger fragments of Archean granite to granodiorite. See research on impacts here. Photo by Steve Shirey