Loess-paleosol sequence over ۲۳,۰۰۰ years ago in Gorgan

The trend of developments and environmental conditions in northern Iran in the Quaternary is one of theimportant issues that, despite a significant study, there is still many ambiguities about it, during glacialand interglacial periods. In this paper, the results of magnetic susceptibility, micromorphology andpalynology studies of the Saadabad examined. The focus of this sequence is ۲۳۰۰۰ years BP. Saadabadsediments were examined with ۵ cm intervals for MS and ۱۰ cm for palynological samples, as a completeand continuous collection of information from ۲۳۰۰۰ years ago to the present, including high-resolutionHolocene events. These data show two interstitials in the MIS۲. In relation to the Holocene, the data showthe predominance of warm and humid conditions in an area where we can see the influence anddevelopment of the Indian summer monsoon and the strengthening and intensification of its humidconditions by westerly systems during the winter. Delays in the development of forests (woodlands) at thebeginning of the Early Holocene have also been reported in this study, and the development of soil andtree pollen has been observed from about ۷-۱۰ thousand years ago, and in ۷۲۰۰ years ago it had itsmaximum value, which increased with Level increased.

Keywords:

Pollen , Loess Archive , Magnetic susceptibility , Micromorphology , Saadabad ۲ , Paleoclimate