摘要
The Cretaceous saw fundamental changes in the nonmarine ecosystem with the origin and/or rise of major clades,including flowering plants,social insects,derived dinosaurs(hadrosaurids,ceratopsids,tyrannosaurids),birds and therian mammals.The rocks that yield this fossil record are widespread and occur on every continent and often contain significant economic resources,notably coal and gas.There is a long and voluminous literature on the correlation of the non-marine Cretaceous that utilizes many taxonomic groups,from pollen to dinosaurs.However,the diverging continents produced provincialization of non-marine biotas that makes global correlations challenging.
