RECONSTRUCTION OF CLIMATE OF PERIOD OF FORMATION OF AMBER-CONTAINING SEDIMENTS OF UKRAINIAN POLISSIA ON THE BASE OF PALYNOLOGICAL DATA BY COEXISTENCE APPROACH METHOD

Abstract

Spore-pollen investigations of amber-bearing rocks of Ukrainian Polissia were conducted, two spore-pollen complexes were obtained. The taxonomic composition of both spore-pollen complexes is identical, they differ only in the proportions of the composition of the individual components: in the first SPC pollen of Pinaceae prevails over Taxodiaceae and Sciadopithys, angiosperm pollen is quite diverse, although its role is subordinate, in the second SPK pollen of Taxodiaceae and Sciadopithys prevails over Pinaceae, and the role of angiosperm pollen sharply decreases to several percent, a significant proportion of this group is Rhus pollen. On the base of own palynological investigation of amber-containing sediments of western Polissia a paleoclimate reconstruction of Mezhygorye time (early Oligocene) by coexistence approach (CA) method was done. The set of climate parameters has been expanded: mean annual temperature (MAT); mean temperature of the coldest month (CMT); mean temperature of the warmest month (WMT); mean annual precipitation (MAP); precipitation of the wettest month (HMP); precipitation of the direst month (LMP); precipitation of the warmest month (WMP). Accuracy of calculation has been increased compared to previous studies. It is established that the climate was warm-temperate, narrow to subtropical (mean annual temperature +15,8°C). It corresponds to the modern climate of Csa-type according to the Koppen-Geiger classification (Mediterranean) or subtropical climate of the western coasts of the continents according to the Alisov classification.