Lac Guillaume-Delisle
| Richmond Gulf Lac Guillaume-Delisle |
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Satellite view
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| Location | Hudson Bay, Nunavik, Quebec |
| Coordinates | 56°14′58″N 76°17′39″W / 56.24944°N 76.29417°WCoordinates: 56°14′58″N 76°17′39″W / 56.24944°N 76.29417°W |
| Primary inflows | Clearwater River |
| Primary outflows | Le Goulet |
| Basin countries | Canada |
| Max. length | 61 km (38 mi) |
| Max. width | 22 km (14 mi) |
| Surface area | 712 km2 (275 sq mi) |
| Settlements | Umiujaq |
| References | |
Richmond Gulf (French: Lac Guillaume-Delisle; Inuktitut: Tasiujaq (which resembles a lake)) is a large triangular-shaped inland bay located on east side of Hudson Bay just above 56th parallel north in Quebec, Canada.
In 2008, regional councilors asked the Commission de toponymie du Québec to rename Richmond Gulf officially as Lac Tasiujaq.
A vast area surrounding the gulf, Clearwater Lakes (Lacs à l'Eau-Claire), and Iberville Lake (Lac D'Iberville) was included in the Tursujuq National Park, officially established on July 18, 2013.
The topography of the Richmond Gulf is the consequence of two geological faults running parallel to the coast. The resulting dislocation has given rise to the cliffs that dominate the western shore of the Gulf.
The western shore is guarded by the steep ramparts of sedimentary rock that rise abruptly out of the brackish waters. This unusual coastal relief of asymmetrical hills are the Hudsonian Cuestas and the highest system of cuestas found in Quebec. There is only one narrow breach in these fortifications at the extreme southwest end, called "Le Goulet" (French meaning "narrows" or "bottleneck"), which is a cataclinal valley 5 kilometres (3.1 mi) long, 300 to 600 metres (980 to 1,970 ft) wide and fringed by cliffs 200 metres (660 ft) high. A large volume of water surges through it with the rise and fall of the tides, creating water level differences of about 0.5 metres (1.6 ft). Consequently, this passage does not freeze in the winter.
The eastern shore rises more gradually and is largely Canadian Shield rock, overlain in many places by basalt. Several large rivers enter Richmond Gulf in boisterous rapids or sheer falls (e.g. Clearwater River).
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Wikipedia