Jurassic climate of large swath of western U.S. was more complex than previously known

Morrison Formation, Jurassic, ancient soil, paleosols, climate, Myers, SMUClimate over a large swath of the western U.S. was more complex during the Jurassic than previously known, according to new research from SMU. Instead of a gradual transition from dry to wetter, chemical analysis of ancient soils reveals there was an unexpected abrupt change. Samples came from the Morrison Formation, which sprawls 13 states and Canada and which has produced dinosaur discoveries for over 100 years.