AMS 14C dating of deglacial events in the Irish Sea Basin and other sectors of the British–Irish ice sheet

2005 ◽  
Vol 24 (14-15) ◽  
pp. 1673-1690 ◽  
Author(s):  
A.M. McCabe ◽  
P.U. Clark ◽  
J. Clark
Keyword(s):  
Ice Sheet ◽  
Irish Sea ◽  
14C Dating ◽  
The Irish Sea ◽  
Ams 14C Dating

III.—On Drift

1874 ◽  
Vol 1 (11) ◽  
pp. 496-510 ◽  
Author(s):  
J. G. Goodchild
Keyword(s):  
Ice Sheet ◽  
Irish Sea ◽  
Glacial Deposits ◽  
The North ◽  
The Irish Sea

In a letter to Nature for 14th May, 1874, Mr. Belt has expressed his belief that the presence of shells in glacial deposits, at whatever elevation they may be found, does not necessarily constitute a proof that the land has been depressed to that extent relatively to the level of the sea; but that in such cases as those of the drifts of the basin of the Irish Sea the shells occur in their present positions because they were thrust thither out of the bed of the sea by the ice-sheet which was advancing from the North.

scholarly journals Late Weichselian Potholes Near Wolverhampton, England

1970 ◽  
Vol 9 (55) ◽  
pp. 125-133 ◽  
Author(s):  
Alan V. Morgan
Keyword(s):  
Sea Ice ◽  
Ice Sheet ◽  
Narrow Channel ◽  
Irish Sea ◽  
Late Weichselian ◽  
The Irish Sea ◽  
Sand And Gravel ◽  
Glacial Streams

Abstract Three potholes and a narrow channel cut into bedrock in a side-hill position were observed beneath an Irish Sea till west of Wolverhampton, England. The potholes and the channel are believed to have been cut by subglacial or latero-glacial streams flowing beneath or immediately beside the Irish Sea ice sheet. They were later choked by sand and gravel from this ice sheet and capped by till which ended the glaciofluvial deposition. Deposits below and above the till have been 14C dated at 30 655 and 13 490 years B.P. at localities between 13 and 27 km north of the trench section described.

scholarly journals Rapid marine deglaciation: asynchronous retreat dynamics between the Irish Sea Ice Stream and terrestrial outlet glaciers

2013 ◽  
Vol 1 (1) ◽  
pp. 277-309
Author(s):  
H. Patton ◽  
A. Hubbard ◽  
T. Bradwell ◽  
N. F. Glasser ◽  
M. J. Hambrey ◽  
...  
Keyword(s):  
Sea Ice ◽  
Ice Sheets ◽  
Ice Sheet ◽  
Irish Sea ◽  
Swath Bathymetry ◽  
Ice Stream ◽  
Non Linear ◽  
Polar Ice Sheets ◽  
The Irish Sea ◽  
Short Time

Abstract. Understanding the retreat behaviour of past marine-ice sheets provides vital context to accurate assessment of the present stability and long-term response of contemporary polar-ice sheets to climate and oceanic warming. Here new multibeam swath-bathymetry data and sedimentological analysis are combined with high resolution ice-sheet modelling to reveal complex landform assemblages and process-dynamics associated with deglaciation of the British-Celtic Ice Sheet (BCIS) within the Irish Sea Basin. Our reconstruction indicates a non-linear relationship between the rapidly receding Irish Sea Ice Stream, the largest draining the BCIS, and the retreat of outlet glaciers draining the adjacent, terrestrially based ice sheet centred over Wales. Retreat of Welsh ice was episodic; superimposed over low-order oscillations of its margin are asynchronous outlet re-advances driven by catchment-wide mass balance variations that are amplified through migration of the ice cap's main ice-divide. Formation of large, linear ridges which extend at least 12.5 km offshore (locally known as sarns) and dominate the regional bathymetry are attributed to repeated frontal and medial morainic deposition associated with the re-advancing phases of these outlet glaciers. Our study provides new insight into ice-sheet extent, dynamics and non-linear retreat across a major palaeo-ice stream confluence zone, and has ramifications for the interpretation of recent fluctuations observed by satellites over short-time scales across marine-sectors of the Greenland and Antarctic ice sheets.

scholarly journals Rapid marine deglaciation: asynchronous retreat dynamics between the Irish Sea Ice Stream and terrestrial outlet glaciers

2013 ◽  
Vol 1 (1) ◽  
pp. 53-65 ◽  
Author(s):  
H. Patton ◽  
A. Hubbard ◽  
T. Bradwell ◽  
N. F. Glasser ◽  
M. J. Hambrey ◽  
...  
Keyword(s):  
Sea Ice ◽  
Ice Sheets ◽  
Ice Sheet ◽  
Irish Sea ◽  
Swath Bathymetry ◽  
Ice Cap ◽  
Ice Stream ◽  
Non Linear ◽  
Polar Ice Sheets ◽  
The Irish Sea

Abstract. Understanding the retreat behaviour of past marine-based ice sheets provides vital context for accurate assessments of the present stability and long-term response of contemporary polar ice sheets to climate and oceanic warming. Here new multibeam swath bathymetry data and sedimentological analysis are combined with high resolution ice-sheet modelling to reveal complex landform assemblages and process dynamics associated with deglaciation of the Celtic ice sheet within the Irish Sea Basin. Our reconstruction indicates a non-linear relationship between the rapidly receding Irish Sea Ice Stream and the retreat of outlet glaciers draining the adjacent, terrestrially based ice cap centred over Wales. Retreat of Welsh ice was episodic; superimposed over low-order oscillations of its margin are asynchronous outlet readvances driven by catchment-wide mass balance variations that are amplified through migration of the ice cap's main ice divide. Formation of large, linear ridges which extend at least 12.5 km offshore (locally known as sarns) and which dominate the regional bathymetry are attributed to repeated frontal and medial morainic deposition associated with the readvancing phases of these outlet glaciers. Our study provides new insight into ice-sheet extent, dynamics and non-linear retreat across a major palaeo-ice stream confluence zone, and has ramifications for the interpretation of recent fluctuations observed by satellites over short timescales across marine sectors of the Greenland and Antarctic ice sheets.

Diatoms in the Holocene sediments of the Dvina Bay (White Sea) as indicators of paleooceanological events

2019 ◽  
pp. 197-200
Author(s):  
Elizaveta A. Agafonova ◽  
Yelena I. Polyakova
Keyword(s):  
Environmental History ◽  
White Sea ◽  
Ice Sheet ◽  
Diatom Assemblages ◽  
14C Dating ◽  
The Holocene ◽  
Scandinavian Ice Sheet ◽  
Holocene Sediments ◽  
History Of ◽  
Ams 14C Dating

The small inland White Sea, located in the western part of the vast shallow Eurasian Arctic shelf, is a key area for detailed reconstruction of the degradation of the latest Scandinavian ice sheet. In this work we aim to reconstruct the environmental history of the Dvina Bay inferred from diatom assemblages and a radiocarbon (AMS 14C) dating. In core 6042 we found diatoms in sediments since the first half of the Preboreal.

scholarly journals Late Weichselian Potholes Near Wolverhampton, England

1970 ◽  
Vol 9 (55) ◽  
pp. 125-133 ◽  
Author(s):  
Alan V. Morgan
Keyword(s):  
Sea Ice ◽  
Ice Sheet ◽  
Narrow Channel ◽  
Irish Sea ◽  
Late Weichselian ◽  
The Irish Sea ◽  
Sand And Gravel ◽  
Glacial Streams

AbstractThree potholes and a narrow channel cut into bedrock in a side-hill position were observed beneath an Irish Sea till west of Wolverhampton, England. The potholes and the channel are believed to have been cut by subglacial or latero-glacial streams flowing beneath or immediately beside the Irish Sea ice sheet. They were later choked by sand and gravel from this ice sheet and capped by till which ended the glaciofluvial deposition. Deposits below and above the till have been 14C dated at 30 655 and 13 490 years B.P. at localities between 13 and 27 km north of the trench section described.

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