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“The Cretaceous Period is one of the major divisions of the geologic timescale, reaching from the...Cretaceous
“The Maastrichtian is the last stage of the Cretaceous period, and therefore of the Mesozoic era...Maastrichtian
“The Yixian Formation is a geological formation in Liaoning, People's Republic of China, that...Yixian Formation
“The Early Cretaceous (timestratigraphic name) or the Lower Cretaceous (logstratigraphic name...Early Cretaceous