Quaternary stratigraphy and palaeogeography on the Black Sea coast of Western Caucasus     

VASILIY M. MURATOV  ALEXANDR B. OSTROVSKY  EFEONORA O. FRIDENBERG 《Boreas: An International Journal of Quaternary Research》1974,3(2):49-60

On the basis of new data a revised stratigraphic scheme for the Anthropogene of the Black Sea region is suggested. Radiological dates are given for the absolute age of the three Black Sea transgressions with a Karangat-type fauna and two Holocene transgressions. The structure of overdeepened estuarine parts of river valleys and the stratigraphy of slope and cave deposits are discussed.  相似文献   

Late Pleistocene and Holocene vegetation and climate on the northern Taymyr Peninsula, Arctic Russia     

ANDREI A. ANDREEV  PAVEL E. TARASOV  CHRISTINE SIEGERT  TOBIAS EBEL  VLADIMIR A. KLIMANOV  MARTIN MELLES  ANATOLY A. BOBROV  ALEXANDR YU. DEREVIAGIN  DAVID J. LUBINSKI  HANS-WOLFGANG HUBBERTEN 《Boreas: An International Journal of Quaternary Research》2003,32(3):484-505

Pollen data from a Levinson-Lessing Lake sediment core (74°28'N, 98°38'E) and Cape Sabler, Taymyr Lake permafrost sequences (74°33'N, 100°32'E) reveal substantial environmental changes on the northern Taymyr Peninsula during the last c. 32 000 [Formula: See Text]C years. The continuous records confirm that a scarce steppe-like vegetation with Poaceae, Artemisia and Cyperaceae dominated c. 32 000-10 300 [Formula: See Text]C yr BP, while tundra-like vegetation with Oxyria, Ranunculaceae and Caryophyllaceae grew in wetter areas. The coldest interval occurred c. 18 000 yr BP. Lateglacial pollen data show several warming events followed by a climate deterioration c. 10 500 [Formula: See Text]C yr BP, which may correspond with the Younger Dryas. The Late Pleistocene/Holocene transition, c. 10 300-10 000 [Formula: See Text]C yr BP, is characterized by a change from the herb-dominated vegetation to shrubby tundra with Betula sect. Nanae and Salix. Alnus fruticosa arrived locally c. 9000-8500 [Formula: See Text]C yr BP and disappeared c. 4000-3500 [Formula: See Text]C yr BP. Communities of Betula sect. Nanae, broadly distributed at c. 10 000-3500 [Formula: See Text]C yr BP, almost disappeared when vegetation became similar to the modern herb tundra after 3500-3000 [Formula: See Text]C yr BP. Quantitative climate reconstructions show Last Glacial Maximum summer temperature about 4°C below the present and Preboreal (c. 10 000 [Formula: See Text]C yr BP) temperature 2-4°C above the present. Maximum summer temperature occurred between 10 000 and 5500 [Formula: See Text]C yr BP; later summers were similar to present or slightly warmer.  相似文献   

Holocene pollen stratigraphy and bog development in the western part of the Kola Peninsula, Russia     

CONSTANTIN KREMENETSKI  TATIANA VASCHALOVA  SERGEI GORIACHKIN  ALEXANDR CHERKINSKY  LEOPOLD SULERZHITSKY 《Boreas: An International Journal of Quaternary Research》1997,26(2):91-102

Pollen and macrofossil investigations and radiocarbon datings were carried out at a bog in the Khibiny mountains and the northernmost bog in European Russia on the Rybachiy Peninsula (69°98'N) on the western part of the Kola Peninsula. Peat accumulation on the Kola Peninsula started at c . 8500–7500 BP. Pinus sylvestris reached its present northern limit on the peninsula by 7000 BP, while 6000–5000/4500 BP was a time of maximal progress of birch forest tundra up to the Barents Sea shoreline. Alnus ineana grew up to the Rybachiy Peninsula c . 40 km north of its present-day northern limit. By c , 5500/5300 BP Picen ohovata had immigrated to the Khibiny mountains. After 5000/4500 BP the forested area had retreated in the northern part of the Kola Peninsula and the tundra belt bordering the Barents Sea shore was formed. By 3500 BP spruce had reached its modern northern limit.  相似文献