Article: Jurassic floras of the Karatau Range, southern Kazakhstan
M. P. Doludenko and E. R. Orlovskaya
A series of six rich floras, containing about 180 plant species, is known from the upper part of the Lower Jurassic (Upper Liassic), the Middle Jurassic, and the Upper Jurassic of Kazakhstan. An analysis of the composition of these floras reveals gradual changes which may be correlated with changes in the climate and palaeogeography of the region. The data on Upper Jurassic megafossil floras is compared with that on their spores and pollen.