scholarly journals Styles of ice-marginal sedimentation and mass-wastage within the Irish Sea sector of the Last British-Irish Ice Sheet: evidence from southeast Anglesey, north Wales, UK

2012 ◽  
Vol 279-280 ◽  
pp. 271
Author(s):  
Jonathan Lee
Keyword(s):  
Ice Sheet ◽  
Irish Sea ◽  
North Wales ◽  
The Irish Sea

scholarly journals Morphological abnormality in thornback ray Raja clavata in the Irish Sea

2021 ◽  
Author(s):  
L. J. Clarke
Keyword(s):  
Irish Sea ◽  
Beam Trawl ◽  
Morphological Abnormality ◽  
Free Swimming ◽  
Pectoral Fins ◽  
North Wales ◽  
Head Section ◽  
Thornback Ray ◽  
Raja Clavata ◽  
The Irish Sea

AbstractA free-swimming thornback ray Raja clavata specimen demonstrating significant morphological abnormality is reported, captured by beam trawl in the Irish Sea off north Wales, UK. The anterior sections of both pectoral fins were separated from the head section for a length of approximately 140 mm extending from the rostrum tip to a point posterior of the spiracles, along with abnormal morphology of the gill slits. This phenomenon has been observed elsewhere but is the first documented example of this abnormality in the eastern Irish Sea, despite widespread targeting of the species across the region by commercial and recreational fishers. Possible causes and consequences of the observed abnormality are discussed.

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.

V.—Notes on Geological Sections, within Forty Miles Radius of Southport

1883 ◽  
Vol 10 (11) ◽  
pp. 500-507
Author(s):  
Charles E. De Rance
Keyword(s):  
The Other ◽  
Irish Sea ◽  
Lake District ◽  
North Wales ◽  
The Irish Sea ◽  
The One ◽  
Carboniferous Limestone ◽  
Sea Coast

Striking a radius of 40 miles from Southport, the line will be seen to intersect the sea-coast near the Silurian districts of Ulverstone in North Lancashire, and Colwyn Bay in North Wales. The succession in both cases is very similar, Denbighshire Grits and Flags of the one area corresponding in time to the Coniston Grits and Flags of the other; and just as the Silurians of the Lake District are overlaid by a fringe of Carboniferous Limestone, so the Silurians of Diganwy are overlaid by the Carboniferous Limestone of the Great and Little Ormes Head. Laid upon a floor of Silurian rocks, the Carboniferous Limestone may be regarded as extending continuously under the Irish Sea, and underlying the various Carboniferous and Triassic rocks now occupying Lancashire.

Cashtal yn Ard, Isle of Man

1936 ◽  
Vol 16 (4) ◽  
pp. 373-395 ◽  
Author(s):  
H. J. Fleure ◽  
G. J. H. Neely
Keyword(s):  
Early Period ◽  
Irish Sea ◽  
Considerable Part ◽  
Isle Of Man ◽  
Local Evidence ◽  
North Wales ◽  
Widespread Agreement ◽  
The Irish Sea ◽  
Set Up

The Isle of Man situate in the midst of the Irish Sea as an intermediate station between Ireland and Cumbria, North Wales and Galloway, has naturally played a considerable part in various phases of western British life in which coastwise maritime movements have had significance. The phase or phases of megalithic construction included, as is generally agreed, a considerable amount of maritime movement along the coasts of western Britain, and monuments of various types were set up. It may be stated at the outset that, since developments even as late as the introduction of Christianity show relations with megaliths, we are not justified, without special local evidence, in ascribing particular megaliths necessarily to an early period, though there is widespread agreement that some must have been in existence at about 2000 B.C., and even possibly earlier.

scholarly journals VI.—On the Millstone Grit of the North Wales Border

1870 ◽  
Vol 7 (68) ◽  
pp. 68-73
Author(s):  
D. C. Davies
Keyword(s):  
Irish Sea ◽  
Eastern Slope ◽  
Natural Boundary ◽  
The West ◽  
The North ◽  
The People ◽  
North Wales ◽  
Great Western Railway ◽  
The Irish Sea ◽  
Carboniferous Limestone

The Millstone Grit of the North Wales Border follows the eastern slope of the Carboniferous Limestone, from Crickheath and Sweeney, South of Oswestry, to the shores of the Irish Sea; it is also thrown up into the range of hills which the traveller by the Great Western Railway may see to the west of the line between Oswestry and Chester. This range serves as a natural boundary between this part of England and Wales, and forms a second line of natural fortification, strengthened on the English side by numerous outposts of low hills of clay, gravel, and sand, which give place, upon the Welsh side, to precipitous escarpments of Mountain Limestone, beyond which the change in the language, dress, and manners of the people is marked and sudden.

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.

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