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| Callard, S. Louise; Cofaigh, Colm O.; Benetti, Sara; Chiverrell, Richard C.; Van Landeghem, Katrien J. J.; Saher, Margot H.; Gales, Jenny A.; Small, David; Clark, Chris D.; Stephen, J. Livingstone; Fabel, Derek; Moreton, Steven G.. |
| During the Last Glacial Maximum (LGM) the marine-terminating Barra Fan Ice Stream (BFIS), a major conduit of the British Irish Ice Sheet (BITS), drained much of western Scotland and northwest Ireland with ice streaming onto the continental shelf of the Malin Sea. The extent and retreat history of this ice stream across the shelf, until now, is not well known. In particular, geochronological constraints on the history of this ice stream have thus far been restricted to deep-sea cores or terrestrial cosmogenic nuclide dating onshore, with ages across the shelf absent. To understand the possible external forcing factors acting on this marine terminating ice stream during retreat, improved geochronological constraint on its deglaciation is necessary. Here, we... |
| Tipo: Text |
Palavras-chave: British-Irish Ice Sheet; Glacimarine; Last glacial maximum; Radiocarbon dating; Ice-sheet retreat; Grounding-zone wedges. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00504/61588/65891.pdf |
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| Small, David; Benetti, Sara; Dove, Dayton; Ballantyne, Colin K.; Fabel, Derek; Clark, Chris D.; Gheorghiu, Delia M.; Newall, Jennifer; Xu, Sheng. |
| Understanding how marine-based ice streams operated during episodes of deglaciation requires geochronological data that constrain both timing of deglaciation and changes in their flow behaviour, such as that from unconstrained ice streaming to topographically restricted flow. We present seventeen new Be-10 exposure ages from glacial boulders and bedrock at sites in western Scotland within the area drained by the Hebrides Ice Stream, a marine-based ice stream that drained a large proportion of the former British-Irish Ice Sheet. Exposure ages from Tiree constrain deglaciation of a topographic high within the central zone of the ice stream, from which convergent flowsets were produced during ice streaming. These ages thus constrain thinning of the Hebrides... |
| Tipo: Text |
Palavras-chave: Exposure dating; Marine ice stream; British-Irish ice sheet; Deglaciation. |
| Ano: 2017 |
URL: https://archimer.ifremer.fr/doc/00420/53148/55337.pdf |
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