On the relative age of the Late Cretaceous Zorin and Chingandga floras, NE Russia
Zorin and Chingandga floras are essentially different in their systematic composition, but their burials are located on the same stratigraphic level. On this basis, they are considered to be even-aged and are dated as the Turonian-Coniacian. The paper shows that the special features of the lithological composition of the plant-bearing deposits, their sequence and the composition of the overlaying volcanic rocks testify that both floras are confined to the first stage of the development of the outer zone of the Okhotsk-Chukotka Volcanic Belt. However, they are separated by one or two local geological events, and accordingly by a significant period of time. So it can be stated that the Zorin flora developed and existed earlier than the Chingandga flora.