VEGETATION OF THE WESTERN COAST OF THE BAIDARATSKAYA BAY AT THE END OF THE LATE PLEISTOCENE

Citation
Aa. Andreev et al., VEGETATION OF THE WESTERN COAST OF THE BAIDARATSKAYA BAY AT THE END OF THE LATE PLEISTOCENE, Stratigraphy and geological correlation, 6(5), 1998, pp. 520-525
Citations number
11
Categorie Soggetti
Geology,Paleontology
ISSN journal
08695938
Volume
6
Issue
5
Year of publication
1998
Pages
520 - 525
Database
ISI
SICI code
0869-5938(1998)6:5<520:VOTWCO>2.0.ZU;2-#
Abstract
The results of palynological analysis of a section of unconsolidated d eposits in the 12-m-high coastal escarpment of the Baidaratskaya Bay ( 68 degrees 51'N, 66 degrees 54'E), the southeastern part of the Yugors kii Peninsula, are outlined. The section includes the lower member of sandy loam rich in ice, presumably accumulated in the late glacial tim e. The upper peat member was accumulated between 8 and 4 ka ago. The r ough boundary between pear and oxbow-lake loams with cryoturbation mar ks suggests a hiatus in sedimentation between 10.9 and 8.2 ka ago. The age of deposits was determined by the radiocarbon method. The results of palynological analysis reveal several phases of vegetation develop ment in the study area and specify their time limits. We believe that the Allerod warming period was more favorable than the Middle Holocene for the development of arboreal-fritucose vegetation in the region no w occupied by typical tundras. This is likely a result of the sea leve l rise at the end of the late Pleistocene and in the first half of the Holocene up to altitudes somewhat exceeding the recent level, when th e influence of the ocean upon climate and vegetation was enhanced.