|North Pacific||AKSR-NASR||Anadyr-Koryak||Verkhoyansk-Chukotka||Okhotsk-Chukotka||N. Alaska||Yukon||Chignik|
|Phytostratigraphy||Images of fossils characteristic of the Type Taphoflora|
The Chignik Subregion, insignificant in area, existed from the Santonian or Campanian to the end of the Paleocene and corresponded to a coastal lowland periodically flooded by sea resulting in a succession of coastal marine, continental terrigenous and coaliferous sediments.
Two floristic assemblages of similar composition are known from the middle and upper parts of the Chignik Formation (Hollick, 1930), and the lower part yields Santonian–Campanian marine mollusc remains.
The flora of the Chignik area is dominated by angiosperms with comparatively small and narrow leaves. It is lacking large-leaved platanoids and contains rare ferns along with infrequent gymnosperms. In general, the Chignik Flora is comparable with the Barykov flora of the AKSR, but lacks Macclintockia.
Interactive map showing the main paleobotanical-paleogeographic subregions in Northeastern Russia.