Absolute Sea Level Curves: Implications for Sequestered Water Volumes: ABSTRACT

A side-scan sonar survey along the western bank of the Laurentian Channel and on the western Grand Banks revealed the occurrence of iceberg furrows that are probably of Late Pleistocene age. The occurrence of furrows in the Gulf of St. Lawrence is significant in that it helps to date iceberg furrows along the northeast Newfoundland–Labrador margin of the northwest Atlantic, provides data on the history of deglaciation of the offshore area of the Atlantic Provinces, provides a means of evaluating sea level curves, and provides additional evidence for the broad regional extent of the Late Pleistocene shoreline at 115 to 120 m.

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Mid-Cretaceous onlap history of the Market Weighton structural high, northeast England

Geological Magazine ◽

10.1017/s0016756899003167 ◽

1999 ◽

Vol 136 (6) ◽

pp. 681-696 ◽

Cited By ~ 9

Author(s):

C. J. UNDERWOOD ◽

S. F. MITCHELL

Keyword(s):

Sea Level ◽

High Frequency ◽

Sedimentary Facies ◽

Relative Sea Level ◽

Western Margin ◽

Level Curves ◽

History Of ◽

Tectonic Settings ◽

Global Sea Level ◽

Structural High

The mid-Cretaceous sediments of northeast England were deposited at the western margin of the southern North Sea Basin, with sedimentation occurring in a range of tectonic settings. Detailed analysis of the areal distribution and sedimentary facies of Aptian to earliest Cenomanian sediments has allowed the pattern of onlap onto the Market Weighton structural high and changes in relative sea level to be documented. Successive onlap episodes during the Early Aptian, Late Aptian and Early Albian culminated in the final flooding of the structure during the Late Albian (varicosum Subzone). Sea-level curves generated from coastal onlap patterns are difficult to relate to published ‘global’ sea-level curves due to the high frequency of the fluctuations in relative sea level observed. Despite this, detailed correlation and analysis of sedimentological events suggest that even the most expanded, basinal succession is relatively incomplete. This study has also shown that the change from dominantly syn-tectonic to dominantly post-tectonic sedimentation style occurred in the late Early Albian.

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Misuse of Fischer plots as sea-level curves

Geology ◽

10.1130/0091-7613(1995)023<0221:mofpas>2.3.co;2 ◽

1995 ◽

Vol 23 (3) ◽

pp. 221 ◽

Cited By ~ 33

Author(s):

Stephen K. Boss ◽

Kenneth A. Rasmussen

Keyword(s):

Sea Level ◽

Level Curves

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A comparison of observed and theoretical postglacial relative sea level in Atlantic Canada

Canadian Journal of Earth Sciences ◽

10.1139/e81-109 ◽

1981 ◽

Vol 18 (7) ◽

pp. 1146-1163 ◽

Cited By ~ 104

Author(s):

Garry Quinlan ◽

Christopher Beaumont

Keyword(s):

Sea Level ◽

Field Data ◽

Sea Level Change ◽

Atlantic Canada ◽

Relative Sea Level ◽

Level Curves ◽

Level Change ◽

The Common ◽

Late Wisconsinan ◽

Outermost Zone

Two extreme models of late Wisconsinan ice cover in Atlantic Canada and the northeastern U.S.A. are shown to produce postglacial relative sea level curves that bracket existing field observations at six sites throughout the region. This suggests that the true late Wisconsinan ice distribution is probably intermediate to the two contrasting reconstructions proposed. Both ice models predict the existence of four relative sea level zones: an innermost zone closest to the centre of glaciation in which relative sea level falls continuously throughout postglacial time; an outermost zone in which it rises continuously; and two transitional zones in which it first falls and then rises in varying proportions according to the distance from the ice margin. The distinctive forms of the relative sea level curves are probably representative of each of the zones and are unlikely to be significantly perturbed even by large local ice readvances. They, therefore, establish patterns with which future field data are expected to conform. The form that the geological record of relative sea level change is likely to take within each zone is discussed and promising settings for the collection of new data are proposed. The common practice of separating relative sea level into an isostatic and a eustatic component is analysed and shown to be incorrect as usually applied. The practice is also shown to be unnecessary because the models discussed in this paper predict changes in relative sea level that can be compared directly with the observations.

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Stratigraphic simulations of the shelf of the Gulf of Lions: testing subsidence rates and sea-level curves during the Pliocene and Quaternary

Terra Nova ◽

10.1111/ter.12091 ◽

2014 ◽

Vol 26 (3) ◽

pp. 230-238 ◽

Cited By ~ 22

Author(s):

Estelle Leroux ◽

Marina Rabineau ◽

Daniel Aslanian ◽

Didier Granjeon ◽

Laurence Droz ◽

...

Keyword(s):

Sea Level ◽

Gulf Of Lions ◽

Level Curves ◽

And Sea Level

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Late Deglaciation of the Central Labrador Coast and Its Implications for the Age of Glacial Lakes Naskaupi and McLean and for Prehistory

Quaternary Research ◽

10.1016/0033-5894(90)90042-j ◽

1990 ◽

Vol 34 (3) ◽

pp. 296-305 ◽

Cited By ~ 25

Author(s):

Peter U. Clark ◽

William W. Fitzhugh

Keyword(s):

Sea Level ◽

Ice Sheet ◽

Late Glacial ◽

Time Frame ◽

Laurentide Ice Sheet ◽

Glacial Lakes ◽

Central Coast ◽

Relative Sea Level ◽

Level Curves

AbstractThe age of the marine limit and associated deglaciation has been estimated from relative sea-level curves for the Hopedale and Nain areas of the central Labrador coast as approximately 7600 ± 200 and 8500 ± 200 yr ago, respectively. These ages indicate that the ice margin remained on the coast for up to 3000 yr longer than previously estimated. Because the central coast is due east of glacial lakes Naskaupi and McLean, the earliest the lakes could have formed was <8500 ± 200 yr ago, with their largest phases being fully established only after 7600 ± 200 yr ago. This suggests that the age of the lakes, and associated deglaciation of the central Labrador-Ungava region, is younger by at least 1500 yr than previously estimated. A late-glacial marine-based ice mass in Ungava Bay that dammed the lakes collapsed ca. 7000 yr ago. Within this time frame, therefore, the glacial lakes only existed for <500 yr. The persistence of the Laurentide Ice Sheet margin on the central Labrador coast until 7600 yr ago probably restricted the northward movement of early prehistoric people into northern Labrador.

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Synchronology

Philosophical Transactions of the Royal Society of London Series B Biological Sciences ◽

10.1098/rstb.1985.0068 ◽

1985 ◽

Vol 309 (1138) ◽

pp. 11-27 ◽

Cited By ~ 2

Keyword(s):

Sea Level ◽

Quantitative Methods ◽

Lower Devonian ◽

Practical Interest ◽

Radiometric Dating ◽

Vertebrate Evolution ◽

Significant Evidence ◽

Red Sandstone ◽

Level Curves ◽

Upper Silurian

Radiometric dating cannot as yet approach the resolution obtainable in Silurian and Devonian biostratigraphy. Progress towards achievement of a global standard for the Wenlock and Emsian interval (against which evolution and environment must be seen) is reviewed. In biostratigraphical correlation with this standard certain groups are especially useful. Correlation between marine Upper Silurian and Lower Devonian rocks and their equivalents in the Old Red Sandstone magnafacies presents particular problems and yet the latter provides significant evidence of plant and vertebrate evolution at this time. The recognition of widespread physical events such as volcanic episodes may sometimes prove useful. Sea level curves seldom provide a precise synchronology not achievable through biostratigraphy. Quantitative methods of correlation are so far of theoretical rather than practical interest.

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A new sea-level curve from Nova Scotia: evidence for a rapid acceleration of sea-level rise in the late mid-Holocene

Canadian Journal of Earth Sciences ◽

10.1139/e95-160 ◽

1995 ◽

Vol 32 (12) ◽

pp. 2071-2080 ◽

Cited By ~ 25

Author(s):

D. B. Scott ◽

K. Brown ◽

E. S. Collins ◽

F. S. Medioli

Keyword(s):

South Carolina ◽

Nova Scotia ◽

Sea Level ◽

Late Holocene ◽

Atlantic Coast ◽

Level Curve ◽

Global Response ◽

Level Curves ◽

Ice Melt ◽

Vertical Extent

A new late Holocene sea-level curve is presented from the Atlantic coast of Nova Scotia. Contrary to earlier data from the same area, this curve starts at 4400 sidereal years before present (BP) and shows a rapid acceleration between 4400 and 3800 BP, which coincides with a similar acceleration already reported from the Northumberland Strait (Nova Scotia) and an oscillation observed in South Carolina. Comparing the two Nova Scotia curves suggests that the acceleration lasts just over 1000 years and has a vertical extent of 10 m. One puzzling fact is that the 10 m vertical extent in Nova Scotia is 8 m more than the same event measured in South Carolina and it cannot be accounted for simply by postglacial isostatic depression, since that occurs on a much longer time scale. A closer examination of most of the sea-level curves from northeastern North America reveals that either the record is missing from this interval or it is inconsistent. We suggest that this acceleration is part of a global response that coincides with the end of the mid-Holocene warming period, possibly indicating a lag response between warming and ice melt.

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