title: Paleoclimate Transition Recorded by Palynological and Clay Mineral Evidence in the Santanghu Basin During the Middle Jurassic
abstract: ABSTRACT The arid event that began in the Middle Jurassic Bathonian stage marks the second major drought event in northern China during the Jurassic period and had a profound impact on the development of modern terrestrial ecosystems. This study reconstructs the paleoclimate and paleoecosystem of the Middle Jurassic Santanghu Basin by analysing palynological assemblages and clay minerals from the Xishanyao and Toutunhe formations. The Xishanyao Formation contains a palynological assemblage of Cy
journal: Geological Journal