Zobrazeno 1 - 10
of 13
pro vyhledávání: '"Geoffrey S. P. Thomas"'
Autor:
David J.A. Evans, Colin K. Ballantyne, Richard C. Chiverrell, I. M. Thrasher, Colm Ó Cofaigh, Katrien J.J. Van Landeghem, Danny McCarroll, James D. Scourse, Chris D. Clark, Geoffrey S. P. Thomas, Andreas Lang
Publikováno v:
Journal of Quaternary Science. 28:200-209
We present an 8000-year history spanning 650km of ice margin retreat for the largest marine- terminating ice stream draining the former British-Irish Ice Sheet. Bayesian modelling of the geochronological data shows the ISIS expanded 34.0-25.3ka, acce
Autor:
Geoffrey S. P. Thomas
Publikováno v:
Journal of Quaternary Science. 4:167-181
The glacial succession in the western part of the Cheshire-Shropshire lowland records the advance, coalescence and subsequent uncoupling of Irish Sea and Welsh ice-sheets during the Late Devensian stage. During advance a discontinuous sheet of basal
Publikováno v:
Journal of Quaternary Science. 25:535-549
The Last Glacial Maximum (LGM) of Marine Isotope Stage (MIS) 2 is defined here as the period either of maximum global ice volume or in which major ice sheets reached their maximum extent. Both definitions lack clarity as there is no reason to suppose
Autor:
Geoffrey S. P. Thomas
Publikováno v:
Boreas. 13:355-364
In general terms the form of the Bride Moraine, its internal structure, and part of its stratigraphy result from a minor ice-sheet readvance during a late stage of the Devensian deglaciation of the Irish Sea basin. Four major structural styles are id
Autor:
A. John Summers, Geoffrey S. P. Thomas
Publikováno v:
Boreas. 13:5-12
A series of large-scale glacio-dynamic structures exposed in 10 km of coastal cliff cut through the Screen Hills kame-morainc, Co. Wexford. Ireland, is descrihed. The structures range from simple ovcrfolds to complex multiple thrusts, have a consiste
Publikováno v:
Quaternary Science Reviews. 26:2375-2405
Late Devensian glacigenic sediments and landforms along the north-west coast of Wales document the advance and subsequent retreat of the eastern margin of an Irish Sea Ice Stream that met, coalesced and ultimately uncoupled from ice radiating outward
Publikováno v:
Quaternary Science Reviews. 25:2868-2893
The geomorphology and sedimentology of a series of Late Midlandian glacigenic sites in Connemara, western Ireland, are described and a set of commonly occurring sedimentary assemblages identified. These form components of a simple model of ice-contac
Publikováno v:
Quaternary Science Reviews. 23:85-106
Remapping of the Quaternary geology of the Isle of Man, and consequent revision of the stratigraphic succession, identifies three glacigenic formations each separated by a major unconformity. The oldest formation, the Shellag, represents an extensive
Publikováno v:
Quaternary Science Reviews. 21:2237-2279
This paper defines the principal architectural elements present within the Pleistocene, glaciolacustrine basin-fill of the Copper River Basin in Alaska. The Copper River drains an intermontane basin via a single deeply incised trench through the Chug
Publikováno v:
Journal of Quaternary Science. 13:255-270
The glacial deposits of the eastern Lleyn Peninsula record the advance, coalescence and subsequent retreat and uncoupling of Welsh and Irish Sea ice-sheets during the Late Devensian cold stage. During advance a thick sheet of basal diamict was deposi