PALEOCLIMATIC CHANGES AND SHORT-PERIOD EVENTS OF THE LATE PLEISTOCENE IN THE RECORD OF LOESSIAL SEDIMENTS OF THE LOZHOK SECTION, SOUTH-EASTERN WEST SIBERIA

2019 ◽  
pp. 17-27
Author(s):  
A. O. Volvakh ◽  
◽  
N. E. Volvakh ◽  
L. G. Smolyaninova ◽  
◽  
...  
Keyword(s):  
Late Pleistocene ◽  
West Siberia ◽  
South Eastern ◽  
Paleoclimatic Changes ◽  
Short Period

Late Pleistocene chronology and paleoclimate of Vancouver Island determined from cave deposits

1981 ◽  
Vol 18 (11) ◽  
pp. 1643-1652 ◽  
Author(s):  
M. Gascoyne ◽  
D. C. Ford ◽  
H. P. Schwarcz
Keyword(s):  
Late Pleistocene ◽  
Growth Period ◽  
Vancouver Island ◽  
Isotopic Equilibrium ◽  
South Central ◽  
Cave Deposits ◽  
Short Period ◽  
Thermal Buffering

Speleothems from four caves in south-central Vancouver Island have been analysed by the 230Th/234U method. Only speleothems from one cave, Cascade Cave, near Port Alberni, contained sufficient uranium for them to be dated. Twenty-seven ages determined for seven speleothems were found to cluster in two periods: 67–28 ka, corresponding to the Olympia interstadial, and <23–10 ka (or <15 ka if corrected for detrital thorium contamination), corresponding to the Fraser (late Wisconsin) deglaciation and Holocene periods. Two speleothems were found to be deposited in isotopic equilibrium with their seepage waters. Profiles of variations in δ18O of the calcite (δ18Oc) of each of the two deposits show a decrease of 1.3‰ over the growth period, 64–28 ka. At all times, δ18Oc was less than δ18O of modern calcite in the cave. Using modern cave temperature and the variation of δ18O of seawater over the dated period, the profiles of δ18Oc are interpreted in terms of a paleotemperature record for the Olympia interstadial in Vancouver Island. The results show a gradual cooling from 4 °C at 64 ka, to 0 °C between 35 and 28 ka. These results are consistent with conditions necessary for speleothem growth and with published work on surficial Wisconsin deposits in the area. No distinct, short-period warming or cooling events are seen in the record, probably due to thermal buffering by the adjacent ocean.

Structure, formation and geochronology of the late Pleistocene and Holocene cover deposits in South-Eastern Lithuania

2010 ◽  
Vol 231 (3-4) ◽  
pp. 85-97 ◽  
Author(s):  
Valentinas Baltrūnas ◽  
Bronislavas Karmaza ◽  
Anatoly Molodkov ◽  
Petras Šinkūnas ◽  
Kęstutis Švedas ◽  
...  
Keyword(s):  
Structure Formation ◽  
Late Pleistocene ◽  
South Eastern

scholarly journals Geomorphology and evolution of the late Pleistocene to Holocene fluvial system in the south-eastern Llanos de Moxos, Bolivian Amazon

CATENA ◽  
2015 ◽  
Vol 127 ◽  
pp. 102-115 ◽  
Author(s):  
A. Plotzki ◽  
J.-H. May ◽  
F. Preusser ◽  
B. Roesti ◽  
S. Denier ◽  
...  
Keyword(s):  
Late Pleistocene ◽  
Fluvial System ◽  
The South ◽  
South Eastern ◽  
Bolivian Amazon ◽  
Late Pleistocene To Holocene

Aggradation and incision since the very late Pleistocene in the Naas River, south-eastern Australia

Geomorphology ◽  
2006 ◽  
Vol 81 (1-2) ◽  
pp. 66-88 ◽  
Author(s):  
Mats G. Eriksson ◽  
Jon M. Olley ◽  
David R. Kilham ◽  
Tim Pietsch ◽  
Robert J. Wasson
Keyword(s):  
Late Pleistocene ◽  
South Eastern ◽  
Eastern Australia ◽  
South Eastern Australia

scholarly journals A review of leaf-miner tephritid flies (Diptera, Tephritidae) of the south-eastern part of West Siberia, Russia

2020 ◽  
Vol 6 ◽  
pp. 637-647
Author(s):  
Mikhail V. Shcherbakov
Keyword(s):  
West Siberia ◽  
Leaf Miner ◽  
Forest Belt ◽  
The South ◽  
Altai Republic ◽  
South Eastern ◽  
Trophic Relation

Eleven leaf-miner tephritid fly species from 7 genera are reviewed for four regions in the south-eastern part of West Siberia, Russia, namely Tomskaya and Kemerovskaya Oblasts, Altaiskii Krai, and Republics of Altai and Khakassia. The share of leaf-miner species in the tephritid fly fauna of the region is 10.2%. Cornutrypeta svetlanae Richter &amp; Shcherbakov, 2000, recorded from four regions, is the most numerous and widely distributed species preferring forest belt in the mountains of Kuznetskii Alatau (Kemerovskaya Oblast and Khakassia), North Altai (Republic of Altai) and West Altai (Altaiskii Krai). Two species are registered in only one region, namely Cornutrypeta spinifrons (Schroeder, 1913) in the forest belt of the Kuznetskii Alatau mountains (Kemerovskaya Oblast) and Hemilea dimidiata (Costa, 1844) in the forest meadows of Tomskaya Oblast. The rarest species in the region are Cornutrypeta spinifrons (Schroeder, 1913) and Trypeta zoe Meigen, 1826 known by single or several specimens only. Comments on the distribution and trophic relation of all the species are provided.

LIGULE: An evaluation of indigenous perennial grasses for dryland salinity management in south-eastern Australia. 1. A base germplasm collection

2001 ◽  
Vol 52 (3) ◽  
pp. 343 ◽  
Author(s):  
W. H. Johnston ◽  
Meredith L. Mitchell ◽  
T. B. Koen ◽  
W. E. Mulham ◽  
D. B. Waterhouse
Keyword(s):  
Low Frequency ◽  
Germplasm Collection ◽  
Perennial Grasses ◽  
Topographic Map ◽  
Vegetation Diversity ◽  
South Eastern ◽  
Short Period ◽  
Eastern Australia ◽  
Collection Sites ◽  
South Eastern Australia

This paper reports on the collection phase of a research program which aimed to identify Australian native grasses that may be useful for pastoral purposes and for controlling land degradation on hill-lands in the high (>500 mm) rainfall zone of south-eastern Australia. Live plants of 37 target species were collected along a number of transects, and at specific locations, in New South Wales and Victoria. The collection sites were generally along public roads, and were chosen for their vegetation diversity. Each collection site was marked on a 1: 250000 topographic map, and detailed notes were taken of the native vegetation, geology, soil types, land use, and other features. Surface (00—10 cm) soil samples were collected at most sites and analysed for phosphorus, pH CaCl 2 , electrical conductivity, and particle size distribution. A total of 807 accessions were collected from 210 locations. At most collection sites, soils were acidic (median pH 5.6); soil phosphorus (Olsen) was in the low range (<8.5 mg/kg); and the target genera occurred with a low frequency (half of the sites yielded 3 accessions or less). Although genera collected in the study could be ranked on the basis of the mean pH of their collection sites, they all tolerated a considerable soil pH range (of about 2mp;mdash;5 pH units). Allowing root and shoot growth to recommence by growing collected plants for a short period in coarse sand considerably improved establishment success. Accessions collected in this study will be further evaluated.

scholarly journals Late Pleistocene horse and camel hunting at the southern margin of the ice-free corridor: Reassessing the age of Wally’s Beach, Canada

2015 ◽  
Vol 112 (14) ◽  
pp. 4263-4267 ◽  
Author(s):  
Michael R. Waters ◽  
Thomas W. Stafford ◽  
Brian Kooyman ◽  
L. V. Hills
Keyword(s):  
North America ◽  
Late Pleistocene ◽  
Empirical Data ◽  
Southern Margin ◽  
Short Period ◽  
Peopling Of The Americas ◽  
Lithic Artifacts ◽  
Chronological Clustering ◽  
Beach Site

The only certain evidence for prehistoric human hunting of horse and camel in North America occurs at the Wally’s Beach site, Canada. Here, the butchered remains of seven horses and one camel are associated with 29 nondiagnostic lithic artifacts. Twenty-seven new radiocarbon ages on the bones of these animals revise the age of these kill and butchering localities to 13,300 calibrated y B.P. The tight chronological clustering of the eight kill localities at Wally’s Beach indicates these animals were killed over a short period. Human hunting of horse and camel in Canada, coupled with mammoth, mastodon, sloth, and gomphothere hunting documented at other sites from 14,800–12,700 calibrated y B.P., show that 6 of the 36 genera of megafauna that went extinct by approximately 12,700 calibrated y B.P. were hunted by humans. This study shows the importance of accurate geochronology, without which significant discoveries will go unrecognized and the empirical data used to build models explaining the peopling of the Americas and Pleistocene extinctions will be in error.

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