A CARBON-DATED POLLEN DIAGRAM FROM THE CAPE BRETON PLATEAU, NOVA SCOTIA

1967 ◽  
Vol 45 (3) ◽  
pp. 339-359 ◽  
Author(s):  
D. A. Livingstone ◽  
A. H. Estes
Keyword(s):  
Nova Scotia ◽  
Radiocarbon Dating ◽  
Late Glacial ◽  
Pollen Diagram ◽  
Cape Breton ◽  
Poplar Trees ◽  
Glacial Time ◽  
Nova Scotian

Organic sedimentation in a lake near the southwestern edge of the Cape Breton Plateau began about 9000 years ago. Before that time the vegetation was an open tundra, probably with scattered conifer and poplar trees. Since then the vegetation has been dominated by closed fir forest of a variety of types not dissimilar to forests growing in various parts of Nova Scotia today. Organic sedimentation and the establishment of forest, and by implication deglaciation, began more recently at Wreck Cove Lake than at any other Nova Scotian locality that has been investigated. The establishment of forest occurred 1300 years sooner in part of lowland Cape Breton, and 1800 years sooner in part of mainland Nova Scotia, than it did on the Cape Breton Plateau. The length of postglacial, preforest time, which cannot be measured by radiocarbon dating, appears to have been much shorter at Wreck Cove than it was in lowland Cape Breton. The Cape Breton Plateau was not, as some phytogeographers have suggested, a nunatak during glacial time. It may have been a center of late-glacial readvance.

scholarly journals Multi-proxy reconstruction of mire development in the Poręby Wojsławskie ecosystem (Sandomierz Basin, southeastern Poland)

2013 ◽  
Vol 40 (3) ◽  
pp. 177-186
Author(s):  
Jacek Chodorowski ◽  
Andrzej Plak ◽  
Irena Pidek ◽  
Radosław Dobrowolski
Keyword(s):  
Water Supply ◽  
Human Impact ◽  
Radiocarbon Dating ◽  
Late Glacial ◽  
Geochemical Data ◽  
Pollen Diagram ◽  
The Holocene ◽  
Se Poland ◽  
Mire Ecosystem ◽  
Precipitation And Temperature

AbstractMulti-proxy analysis (sedimentological, palaeobotanical, geochemical data and results of radiocarbon dating) of the biogenic sediments from a small mire ecosystem in the Sandomierz Basin (SE Poland) is presented. The ecosystem contains a full hydroseral sequence from minerotrophic to ombrotrophic wetland. It is one of the few sites in this region which is so thoroughly investigated in terms of the palaeoenvironmental record. Changes in the water supply of the mire area, and consequently the changes in the plant and sediment succession, were well correlated with the regional tendencies in precipitation and temperature during the Late Glacial/Holocene transition and in the Holocene. Human impact is very well recorded in pollen diagram from the Subboreal period.

Allerød–Younger Dryas Coleoptera from western Cape Breton Island, Nova Scotia, Canada

1996 ◽  
Vol 33 (1) ◽  
pp. 33-41 ◽  
Author(s):  
Randall F. Miller
Keyword(s):  
Nova Scotia ◽  
Younger Dryas ◽  
Late Glacial ◽  
Cold Climate ◽  
Western Cape ◽  
Cape Breton Island ◽  
Cape Breton ◽  
Beetle Assemblages ◽  
Climate Indicator ◽  
Younger Dryas Event

Studies of Coleoptera remains from two late-glacial sites on Cape Breton Island, Nova Scotia, Canada, present a picture of the paleoenvironment and paleoclimate during the Allerød–Younger Dryas transition in the Maritimes region. They provide evidence for the Younger Dryas event in northeastern North America. Between 11 300 and 10 800 BP, the beetle assemblages at the Campbell site are typical of faunas of the modern middle to northern boreal forest. The West Mabou site contains beetle fossils younger than 10 900 BP, possibly as young as 10 500 BP, extending into the time period of the Younger Dryas, dated from 10 800 to 10 000 BP in the Maritimes. A "cold climate" indicator recognizable in the beetle fauna, Olophrum boreale, occurs in relative abundance and provides an interesting comparison with sites in Europe where the same northern boreo-montane species is evident at the beginning of the Younger Dryas.

A Reassessment of U-Th and14C Ages for Late-Glacial High-Frequency Hydrological Events at Searles Lake, California

1998 ◽  
Vol 49 (1) ◽  
pp. 11-23 ◽  
Author(s):  
Jo C. Lin ◽  
Wallace S. Broecker ◽  
Sidney R. Hemming ◽  
Irena Hajdas ◽  
Robert F. Anderson ◽  
...  
Keyword(s):  
High Frequency ◽  
Radiocarbon Dating ◽  
Age Determination ◽  
Ice Cores ◽  
Close Correlation ◽  
Late Glacial ◽  
Radiocarbon Age ◽  
Abrupt Changes ◽  
Dry Conditions ◽  
Glacial Time

U-Th isochron ages of tufas formed on shorelines suggest that the last pluvial event in Lake Lahontan and Searles Lake was synchronous at about 16,500 cal yr B.P. (equivalent to a radiocarbon age of between 14,000 and 13,500 yr B.P.), whereas the timing of this pluvial event determined by radiocarbon dating is on the order of 1000 yr younger. The timing of seven distinct periods of near desiccation in Searles Lake during late-glacial time has been reinvestigated for U-Th age determination by mass spectrometry. U-Th dating of evaporite layers in the interbedded mud and salt unit called the Lower Salt in Searles Lake was hampered by the uncertainty in assessing the initial 230Th/232Th of the samples. The resulting ages, corrected by a conservative range of initial 230Th/232Th ratios, suggest close correlation of the abrupt changes recorded in Greenland ice cores (Dansgaard-Oeschger events) and wet–dry conditions in Searles Lake between 35,000 and 24,000 cal yr B.P.

Deglaciation of Port Hood Island, Nova Scotia

1974 ◽  
Vol 11 (10) ◽  
pp. 1357-1365 ◽  
Author(s):  
J. Terasmae
Keyword(s):  
Nova Scotia ◽  
Radiocarbon Dating ◽  
Climatic Conditions ◽  
Western Cape ◽  
Cape Breton Island ◽  
Cape Breton ◽  
Soil Creep ◽  
Palynological Study ◽  
Surficial Deposits

A palynological study and radiocarbon dating of surficial deposits on Port Hood Island, Nova Scotia, have indicated that deglaciation occurred more than 11 000 yr B.P., and that the presence of an 'upper till' in local depressions is attributable to soil-creep processes under cold and wet climatic conditions some 11 000 to 10 000 yr B.P. No evidence was found of an ice advance younger than 11 000 yr B.P. in western Cape Breton Island.

The Croonian Lecture - Radiocarbon dating and Quaternary history in Britain

1961 ◽  
Vol 153 (952) ◽  
pp. 287-320 ◽  
Keyword(s):  
Radiocarbon Dating ◽  
Late Glacial ◽  
Climatic Changes ◽  
Complex Interaction ◽  
Quaternary Period ◽  
Climatic Oscillation ◽  
Last Glaciation ◽  
Quaternary History ◽  
Glacial Time ◽  
Raised Beaches

The lecture is an attempt to show the way in which research upon the Quaternary Period in Britain is being affected by the application to it of radiocarbon dating. Mild interstadial periods during the last glaciation can be distinguished, set in sequence and related to similar European interstadials. It is shown that a brief climatic oscillation occurs widely in the Late-glacial transition from Full-glacial to Post-glacial time, and that the vegetational changes registered in pollen zonations of the Post-glacial Period are to some degree synchronous. They reflect widespread climatic changes, as do major horizons in bog stratigraphy that can also be correlated by radiocarbon dating. The method has a most powerful application to archaeology and it promises some resolution of the complex interaction of eustatic, isostatic and tectonic factors that have affected those relative movements of land and sea level recorded by the submerged forests, estuarine formations and raised beaches of the British Isles. Between the results of British Quaternary study in these and other fields there is developing considerable consistency of pattern , as also between British Quaternary History and that of other parts of the world.

Late-glacial (Allerød – Younger Dryas) Coleoptera from central Cape Breton Island, Nova Scotia, Canada

1997 ◽  
Vol 34 (3) ◽  
pp. 247-259 ◽  
Author(s):  
Randall F. Miller
Keyword(s):  
Nova Scotia ◽  
Boreal Forest ◽  
Younger Dryas ◽  
Ground Cover ◽  
Late Glacial ◽  
Polar Front ◽  
Climate Data ◽  
Cape Breton Island ◽  
The North ◽  
Cape Breton

Coleoptera from three late-glacial sites on Cape Breton Island, Nova Scotia, Canada, provide proxy climate data from 12 600 to 10 400 BP. Samples older than about 11 800 BP contain tundra to tree-line species. Between 11 800 and about 10 800 BP, beetle assemblages become typical of the modern boreal forest. Beetles younger than 10 800 BP responded to climatic deterioration during the Younger Dryas. Although coleopteran evidence for the Younger Dryas is not as strong as that presented by palynological and stratigraphic studies, the appearance of Olophrum boreale and other species found today in the northern boreal forest and on tundra or coastal tundra corresponds with the decline of shrub birch and the rise in willow and alder pollen. Beetles responded just as likely to changes in vegetation and ground cover as to changes in temperature. The extent to which Coleoptera were affected may lie somewhere between a moderated continental response seen in the Great Lakes region in North America and more extreme changes recorded in Europe. This response is consistent with shifts in the North Atlantic oceanic Polar Front in the Ruddiman and McIntyre model.

The Sydney Coalfield of Cape Breton, Nova Scotia

1894 ◽  
Vol 38 (984supp) ◽  
pp. 15724-15725
Author(s):  
Hugh Fletcher
Keyword(s):  
Nova Scotia ◽  
Cape Breton

Cape Breton ruby, a new Canadian gemstone discovery, Cape Breton Island, Nova Scotia

2007 ◽  
Vol 30 (5) ◽  
pp. 279-286 ◽  
Author(s):  
David J. Mossman ◽  
James D. Duivenvoorden ◽  
Fenton M. Isenor
Keyword(s):  
Nova Scotia ◽  
Cape Breton Island ◽  
Cape Breton
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