news to me. It rained for 2 million years
https://en.wikipedia.org/wiki/Carnian_pluvial_episode
The Carnian pluvial episode (CPE), often called the Carnian pluvial event, was an interval of major changes in global climate and the dominant plants and animals, or biota, of Earth that occurred during the Carnian age of the late Triassic period. It occurred over several million years (approximately 234-232 million years ago), across the boundary between the Julian and Tuvalian subages of the Carnian.[6][7] It led to the evolution and diversification of many important groups of life, including the first dinosaurs, lepidosaurs (ancestors of modern-day snakes and lizards), and calcium-containing microfossils, as well as a wider array of conifers and stony corals.[8][7][9] The CPE also led to the extinction of many aquatic invertebrate species, especially among the ammonoids, conodonts, bryozoa, and crinoids.[6]