November 18, 2021
(Bloomberg) - Mark Siffin’s love affair with the Permian era started when he was a teenager on a surfboard in Hawaii. He was bobbing off the coast of Oahu when Diamond Head, the state’s most recognizable landmark, caught his eye. Its formation, the product of a volcanic eruption many millennia ago, fascinated him. So when Siffin got the chance some 50 years later to tap an even older rock, he dove right in.