Геологийн асуудлууд дугаар 19 (554) (2021) …
b/Sr, Sr/Ba, 1000xRb/K2O and CIA) reflect that coal seams were accumulated in warmer and more humid climate, when paleo-weathering was intense, whereas sandstones were deposited in relatively cold and arid climate. In Late Jurassic, it is. more likely that paleoclimate became more arid and cold compared with Middle Jurassic, indicated by …