State of the Planet

News from the Columbia Climate School

triassic period

  • Amid a Fossil Bonanza, Drilling Deep into Pre-Dinosaurian Rocks

    Amid a Fossil Bonanza, Drilling Deep into Pre-Dinosaurian Rocks

    On a high ridge in Arizona’s Petrified Forest National Park, paleontologist Paul Olsen sits on the fallen trunk of a 215-million-year-old tree, now turned to stone. The tree once loomed 70 or 80 feet above a riverine landscape teeming with fish, turtles, giant crocodilians and tiny, early species of dinosaurs.

  • Photo Essay: Unearthing the Lost World Below a Petrified Forest

    Photo Essay: Unearthing the Lost World Below a Petrified Forest

    In Arizona’s Petrified Forest National Park, researchers are scouring the fossil-rich surface and drilling deep into ancient rocks to learn what happened during the late Triassic, some 201 million to 235 million years ago.

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Recent record-breaking heat waves have affected communities across the world. The Extreme Heat Workshop will bring together researchers and practitioners to advance the state of knowledge, identify community needs, and develop a framework for evaluating risks with a focus on climate justice. Register by June 15

  • Amid a Fossil Bonanza, Drilling Deep into Pre-Dinosaurian Rocks

    Amid a Fossil Bonanza, Drilling Deep into Pre-Dinosaurian Rocks

    On a high ridge in Arizona’s Petrified Forest National Park, paleontologist Paul Olsen sits on the fallen trunk of a 215-million-year-old tree, now turned to stone. The tree once loomed 70 or 80 feet above a riverine landscape teeming with fish, turtles, giant crocodilians and tiny, early species of dinosaurs.

  • Photo Essay: Unearthing the Lost World Below a Petrified Forest

    Photo Essay: Unearthing the Lost World Below a Petrified Forest

    In Arizona’s Petrified Forest National Park, researchers are scouring the fossil-rich surface and drilling deep into ancient rocks to learn what happened during the late Triassic, some 201 million to 235 million years ago.