Early Holocene deglaciation of the eastern coast of Hudson Bay

Lajeunesse, Patrick

doi:10.1016/j.geomorph.2007.11.012

Cited by 22 publications

(21 citation statements)

References 58 publications

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“…Hardy, 1977;Dyke and Prest, 1987;Dredge and Cowan, 1989;Veillette, 1994;Clarke et al, 2003Clarke et al, , 2004. Following final lacustrine drainage and subsequent incursion by the Tyrrell Sea waters (precursor of Hudson Bay), the Nastapoka hills and the high cuestas on the east coast of Hudson Bay acted as a pinning point for a temporary stillstand of the western margin of the Quebec-Labrador Ice Sheet (QLIS) at an estimated date of~8450 calendar years before present (cal BP) (UL-1932;Lajeunesse, 2008). The associated deposits, called "the Nastapoka Drift Belt", consist mainly of an alignment of ice-contact glacio-marine fan complexes.…”

Section: Introductionmentioning

confidence: 99%

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Deglaciation landforms and C-14 chronology of the Lac Guillaume-Delisle area, eastern Hudson Bay: A report on field evidence

2012

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Section: Introductionmentioning

confidence: 99%

“…South of the Nastapoka hills area, few studies (Hillaire-Marcel, 1976, 1980Allard and Seguin, 1985;Paradis, 1994, 1995;Lajeunesse, 2008) have addressed the deglaciation history of the western margin of the QLIS immediately after the break-up of the LIS over Hudson Bay and just prior to the final ice decay over the Québec-Labrador area.…”

Section: Introductionmentioning

confidence: 99%

Deglaciation landforms and C-14 chronology of the Lac Guillaume-Delisle area, eastern Hudson Bay: A report on field evidence

2012

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“…(Lajeunesse, 2008). Relics of this moraine, the Nastapoka Drift Belt, have been observed from Whapmagoostui-Kuujjuarapik (Figure 1) to Inukjuak, all along the arc-shaped coast of Hudson Bay (Lajeunesse, 2008). The deglaciation of the region was followed by the marine invasion of the Tyrrell Sea, which reached a depth of 145-150 m in the Inukjuak region ca.7000-6500 cal.…”

Section: Tunnel Entrancementioning

confidence: 93%

“…yr B.P. (Lajeunesse, 2008). Relics of this moraine, the Nastapoka Drift Belt, have been observed from Whapmagoostui-Kuujjuarapik (Figure 1) to Inukjuak, all along the arc-shaped coast of Hudson Bay (Lajeunesse, 2008).…”

Section: Tunnel Entrancementioning

confidence: 95%

The geoarchaeology and traditional knowledge of winter sod houses in eastern Hudson Bay, Canadian Low Arctic

2011

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A multidisciplinary study was undertaken at the Qijurittuq Site (IbGk-3) on Drayton Island in Low-Arctic Quebec (Canada) to document the relationships between climatic, environmental, and cultural changes and the choice of Thule/Inuit dwelling style in the eastern Arctic. Several marine terraces were 14 C-dated with shells in order to reconstruct the area's uplift (glacioisostatic rebound) curve. Plant macrofossil analysis of peat was conducted to reconstruct past vegetation and, indirectly, past climate. Archaeological surveys and excavations characterized the structure of subterranean sod houses at the Qijurittuq Site and were supplemented with open interviews with Inuit elders for a better understanding of site location and the use of household space. The sites selected for habitation were well-drained sandy marine terraces in a valley sheltered from prevailing winds. Sod houses were in turn made possible by the abundance of driftwood on the island and the presence of nearby peatland. Thule/Inuit people used semi-subterranean houses rather than igloos at the Qijurittuq Site during the dry, cold conditions toward the end of the Little Ice Age. Stable environmental conditions and food supply during winter possibly explain the use of those semipermanent houses on Drayton Island. However, it does not exclude the use of igloos during short expeditions on ice.

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“…Along the Hudson Bay shore, Proterozoic metasedimentary rocks of the Churchill Province form a series of cuestas with elevations ranging from 150 to more than 300 m a.s.l. (Lajeunesse 2008). Glacial retreat around the Hudson Bay region occurred during the early Holocene, at around 8000 years B.P.…”

Section: Study Sitementioning

confidence: 99%

Periphytic diatom community structure in thermokarst ecosystems of Nunavik (Québec, Canada)

et al. 2017

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Climate change is causing rapid permafrost degradation across Arctic and subarctic regions, resulting in changes in the size, abundance, and structure of thermokarst (thaw) ponds and lakes. The main objectives of this study were to analyze periphytic diatom communities and their affinity to vegetation substrates in thermokarst ecosystems located in the eastern Hudson Bay region and to establish a first inventory of diatom assemblages and the associated littoral vegetation in these systems. Some generalist diatom species, including Tabellaria flocculosa, occupied all ecological niches in the water bodies. In contrast, genera such as Eunotia and Pinnularia were more specialized and generally concentrated on moss substrates. Shoreline vegetation and thermokarst pond/lake littoral morphology (slope) resulted in limnological conditions that differed between sites and ultimately affected diatom community structure. Our results show that both shoreline vegetation and diatom communities are diverse in thermokarst ecosystems, and their species composition depends mostly on site-specific properties (available microhabitats, local pond/lake morphology) rather than limnological conditions that are closely aligned with regional ecoclimatic conditions.

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Early Holocene deglaciation of the eastern coast of Hudson Bay

Cited by 22 publications

References 58 publications

Deglaciation landforms and C-14 chronology of the Lac Guillaume-Delisle area, eastern Hudson Bay: A report on field evidence

Deglaciation landforms and C-14 chronology of the Lac Guillaume-Delisle area, eastern Hudson Bay: A report on field evidence

The geoarchaeology and traditional knowledge of winter sod houses in eastern Hudson Bay, Canadian Low Arctic

Periphytic diatom community structure in thermokarst ecosystems of Nunavik (Québec, Canada)

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