Skip to main content
    • Aa
    • Aa

A Regional Stratigraphic Isochron (ca. 8000 14C yr B.P.) from Final Deglaciation of Hudson Strait

  • Michael W. Kerwin (a1)

Sedimentologic, rock-magnetic, and X-ray fluorescence data from two marine sediment cores in Hudson Strait suggest that a red, hematite-rich clay layer was deposited throughout the strait during the final collapse of the Laurentide Ice Sheet in the vicinity of northern Hudson Bay and western Hudson Strait. This layer, which can be recognized by its reddish-pink color (10YR6/2 to 5YR4/2) and relatively high-hematite proportions (low magnetic susceptibility and magnetite-to-hematite ratio), is dated from 8000 to 7900 14C yr B.P. at both ends of the strait. The Dubawnt Group, a Proterozoic bedrock unit in northern Hudson Bay, is the most likely source of this stratigraphic isochron. In eastern Hudson strait, the recognition of this red unit and other distal glaciomarine sediments from 8400 to 7900 14C yr B.P. indicates that little sediment from the nearby Labrador Dome reached eastern Hudson Strait during this 500-yr interval. This time interval immediately postdates the Noble Inlet advance, a northward flow of Labrador ice across eastern Hudson Strait onto southern Baffin Island from ca. 8900 to 8400 14C yr B.P. One explanation for the lack of Labrador sediments is that the northern margin of the Labrador dome was cold-based for up to 500 yr following the Noble Inlet advance.

Linked references
Hide All

This list contains references from the content that can be linked to their source. For a full set of references and notes please see the PDF or HTML where available.

R. B. Alley , and D. R. MacAyeal (1994). Ice-rafted debris associated with binge–purge oscillations of the Laurentide Ice Sheet. Paleoceanography 9, 503511.

J.T. Andrews , and G. Falconer (1969). Late glacial and post-glacial history and emergence of the Ottawa Islands, Hudson Bay, Northwest Territories: Evidence on the deglaciation of Hudson Bay. Canadian Journal of Earth Sciences 6, 12631276.

J. T. Andrews , B. MacLean , M. Kerwin , W. Manley , A.E. Jennings , and F. Hall (1995b). Final stages in the collapse of the Laurentide Ice Sheet, Hudson Strait, NWT: 14C AMS dates, seismic stratigraphy, and magnetic susceptibility logs. Quaternary Science Reviews, 14, 9831004.

G. Bond , and 13 others (1992). Evidence for massive discharges of icebergs into the glacial Northern Atlantic. Nature 360, 245249.

G. Bond , W.S. Broecker , S. Johnsen , J. McManus , L. Labeyrie , J. Jouzel , and G. Bonani (1993). Correlations between climate records from North Atlantic sediments and Greenland ice. Nature 365, 143147.

J. P. Coakley , and J. P. M. Syvitski (1991). SediGraph technique. In “Principles, Methods, and Applications of Particle Size Analysis” ( J. P. M. Syvitski , Ed.), pp. 129142. Cambridge Univ. Press, New York.

A. S. Dyke , and V. K. Prest (1987). Late Wisconsin and Holocene history of the Laurentide Ice Sheet. Geographie Physique et Quaternaire 41, 237263.

R. J. Fulton [Ed.] (1989). “Quaternary Geology of Canada and Greenland.” Geological Society of America, Boulder, CO.

D. S. Kaufman , G. H. Miller , J. A. Stravers , and J. T. Andrews (1993). An abrupt early Holocene (9./1–/2.6 kyr BP) ice stream advance at the mouth of Hudson Strait, Arctic Canada. Geology 21, 10631066.

J. Kleman , I. Borgstrom , and C. Hattestrand (1994). Evidence for a relict glacial landscape in Quebec-Labrador. Palaeogeography, Palaeoclimatology, Palaeoecology, 111, 217228.

N. K. Koç-Karpuz , and E. Jansen (1992). A high-resolution diatom record of the last deglaciation from the SE Norwegian Sea: Documentation of rapid climatic changes. Paleoceanography 7, 499520.

C. A. Laymon (1992). Glacial geology of western Hudson Strait, Canada, with reference to Laurentide Ice Sheet dynamics. Geological Society of America Bulletin, 104, 11691177.

S. J. Lehman , and L. D. Keigwin (1992). Sudden changes in North Atlantic circulation during the last deglaciation. Nature 356, 757762.

D. R. MacAyeal (1993). Growth/purge oscillations of the Laurentide Ice Sheet as a cause of North Atlantic's Heinrich events. Paleoceanography 8, 775784.

B. MacLean , G. Vilks , and B. Deonarine (1992). Depositional environments and history of late Quaternary sediments in Hudson Strait and Ungava Bay: Further evidence from seismic and biostratigraphic data. G éographie Physique et Quaternaire 46(3), 311329.

G.H. Miller , J. Hearty , and J. A. Stravers (1988). Ice-sheet dynamics and glacial history of southeastern most Baffin Island and outermost Hudson Strait. Quaternary Research 30, 116136.

A. B. Silis (1993). “Late Quaternary foraminiferal biostratigraphy of Hudson Strait.” Report for the Environmental Marine Geology Section of the Atlantic Geoscience Centre, Dartmouth, Nova Scotia.

J.A. Stravers , G.H. Miller , and D. S. Kaufman (1992). Late glacial ice margins and deglacial chronology for southeastern Baffin Island and Hudson Strait, eastern Canadian Arctic. Canadian Journal of Earth Sciences 29, 10001017.

R. Thompson , and F. Oldfield (1986). “Environmental Magnetism.” Allen and Unwin, London.

G. Vilks , B. MacLean , B. Deonarine , C.G. Currie , and K. Moran (1989). Late Quaternary paleoceanography and sedimentary environments in Hudson Strait. Géographie Physique et Quaternaire 43(2), 161178.

Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

Quaternary Research
  • ISSN: 0033-5894
  • EISSN: 1096-0287
  • URL: /core/journals/quaternary-research
Please enter your name
Please enter a valid email address
Who would you like to send this to? *


Abstract views

Total abstract views: 20 *
Loading metrics...

* Views captured on Cambridge Core between 20th January 2017 - 26th July 2017. This data will be updated every 24 hours.