A comprehensive paleobotanic study of the major stratigraphic sections of the Tertiary nonmarine deposits of Alaska and Asia indicates the possibility of their correlation. (1) Chickaloon Formation = Avekov Suite. These strata contain warm-temperate plant assemblages with a few subtropical plants. (2) Fultonian and lower Ravenian = Tastakh Suite. Angiosperms, subtropical and tropical assemblages with a few warm-temperate trees, are found in these strata. Gymnosperms include Cupressaceae, Taxodiaceae, with some Pinaceae. (3) Upper Kummerian = Omoloy Suite. The Omoloy flora consists of warm-temperate angiosperms, mainly Betulaceae with some broad-leaf trees. Dominant among the gymnosperms are Pinaceae, including Keteleeria, Cedrus, and Dacridium; there are a few Taxodiacea. (4) Tsadaka Formation = Koinatkhun Beds. The assemblages from the lower Koinatkhun strata resemble those from the upper Angoonian; those from the upper strata resemble forms from the lower Seldovian. (5) Seldovian = Marecane, Pekulneyveyem, Namtsi, and Mamoth-mount Suites and the Upper Nera Beds. Coastal conifers--broad-leaf trees with some subtropical components; midland-upland conifers and birches with some broad-leaf trees are typical of these strata. The age of the Marecane Suite is confirmed by marine mollusks. (6) Homerian = Osinovscaya Member. The predominant families are Pinaceae and Betulaceae, with scarce broad-leaf plant assemblages. (7) The transitional strata are from Homerian to Clamgulchian = Tirekhtyakh, Khapchan, and Gusinka Beds and the Delyankir Beds, Erman Suite. The ower strata have floras which are similar to Homerian ones, whereas the middle to upper beds contain boreal assemblages with a dominance of Betulaceae and Pinaceae. The age of the Erman Suite is confirmed by marine faunas. (8) Middle Clamgulchian = Enemten Suite, Improveem Beds. The suite contains Salix assemblages with Betulaceae and several genera of Pinaceae. The evolution of the Tertiary floras in Asia proceeded from warm-temperate Paleogene floras to subtropical Eocene floras; in middle Oligocene-late Miocene time, the dominating floras were warm-temperate forms of the Turgay type. These become extinct toward the top End_Page 2469------------------------------ of the section. Pliocene floras are temperate types which gave rise to the Quaternary forms. End_of_Article - Last_Page 2470------------