Drabon’s team recently discovered some zircon crystals that are 3.3 billion to 4.1 billion years old in the Green Sandstone Bed in South Africa (Geology 2018, DOI: 10.1130/G45276.1). Isotopic ...

Much of Stonehenge has remained almost unchanged since Stone Age builders erected its massive sandstone boulders ... The quartz crystals that make up the sarsens form an interlocking structure ...

There’s a 700-pound cluster of craggy pyrite crystals; a half-ton ... This towering 2-million-year-old sandstone concretion from Fontainebleau, France, was formed by the swirling of water through fine ...

my advice is to think about crystals. Unfathomably large crystals ... buckling up layers of oceanic sandstone. “The overlying pressure from the resulting mountain of rocks squeezed hot silicon ...