Georgia Depression
Encyclopedia
The Georgia Depression is a landform
in the Pacific Northwest
, part of the Insular Mountain System
of the North American Cordillera
in British Columbia
, Canada
, and in Washington, United States
. It includes the Fraser Lowland
, roughly equivalent to the region known as the Lower Mainland
, and the Nanaimo Lowland and Nahwitti Lowland on Vancouver Island
, as well as the Discovery Islands
, an archipelago of many low-lying islands between them in the Johnstone Strait
and adjoining waterways between the mainland and Vancouver Island. Farther north in the Coastal Trough is the Hecate Depression, which underlies Hecate Strait
, Queen Charlotte Sound, Queen Charlotte Strait
, and the Dixon Entrance
. North of depression is the Alexander Archipelago
, and to its east it is flanked by the Coast Mountains
and the Washington portion of the Cascade Range
. To its west are the Queen Charlotte Islands
, including the Queen Charlotte Mountains
and Nahwitti Depression, and the Vancouver Island Ranges
and the Olympic Mountains
in Washington Strait
. The Trough includes the Puget Lowland (see Puget Sound basin
).
Landform
A landform or physical feature in the earth sciences and geology sub-fields, comprises a geomorphological unit, and is largely defined by its surface form and location in the landscape, as part of the terrain, and as such, is typically an element of topography...
in the Pacific Northwest
Pacific Northwest
The Pacific Northwest is a region in northwestern North America, bounded by the Pacific Ocean to the west and, loosely, by the Rocky Mountains on the east. Definitions of the region vary and there is no commonly agreed upon boundary, even among Pacific Northwesterners. A common concept of the...
, part of the Insular Mountain System
Insular Mountains
The Insular Mountains are a range of mountains in the Pacific Coast Ranges on the coast of British Columbia, Canada, comprising the Vancouver Island Ranges and Queen Charlotte Mountains. The Insular Mountains are rugged, particularly on Vancouver Island where peaks in Strathcona Provincial Park...
of the North American Cordillera
North American Cordillera
The North American Cordillera is the North American portion of the American Cordillera which is a cordillera extending up and down the western side of the Americas. The North American Cordillera covers an extensive area of mountain ranges, intermontane basins, and plateaus in western North...
in British Columbia
British Columbia
British Columbia is the westernmost of Canada's provinces and is known for its natural beauty, as reflected in its Latin motto, Splendor sine occasu . Its name was chosen by Queen Victoria in 1858...
, Canada
Canada
Canada is a North American country consisting of ten provinces and three territories. Located in the northern part of the continent, it extends from the Atlantic Ocean in the east to the Pacific Ocean in the west, and northward into the Arctic Ocean...
, and in Washington, United States
United States
The United States of America is a federal constitutional republic comprising fifty states and a federal district...
. It includes the Fraser Lowland
Fraser Lowland
The Fraser Lowland is a landform and physiographic region of the Pacific Northwest, in the Canadian province of British Columbia and the U.S. state of Washington. It includes much of the Lower Mainland region of British Columbia and a portion of Whatcom County, south of the Canada–US border...
, roughly equivalent to the region known as the Lower Mainland
Lower Mainland
The Lower Mainland is a name commonly applied to the region surrounding and including Vancouver, British Columbia, Canada. As of 2007, 2,524,113 people live in the region; sixteen of the province's thirty most populous municipalities are located there.While the term Lower Mainland has been...
, and the Nanaimo Lowland and Nahwitti Lowland on Vancouver Island
Vancouver Island
Vancouver Island is a large island in British Columbia, Canada. It is one of several North American locations named after George Vancouver, the British Royal Navy officer who explored the Pacific Northwest coast of North America between 1791 and 1794...
, as well as the Discovery Islands
Discovery Islands
The Discovery Islands are the islands in the Discovery Passage between Vancouver Island and the mainland in British Columbia. These islands are sometimes considered to be part of the Northern Gulf Islands....
, an archipelago of many low-lying islands between them in the Johnstone Strait
Johnstone Strait
Johnstone Strait is a channel along the north east coast of Vancouver Island in British Columbia, Canada. Opposite the Vancouver Island coast, running north to south, are Hanson Island, West Cracroft Island, the mainland British Columbia Coast, Hardwick Island, West Thurlow Island and East...
and adjoining waterways between the mainland and Vancouver Island. Farther north in the Coastal Trough is the Hecate Depression, which underlies Hecate Strait
Hecate Strait
Hecate Strait is a wide but shallow strait between the Haida Gwaii and the mainland of British Columbia, Canada. It merges with Queen Charlotte Sound to the south and Dixon Entrance to the north...
, Queen Charlotte Sound, Queen Charlotte Strait
Queen Charlotte Strait
Queen Charlotte Strait is a strait between Vancouver Island and the mainland of British Columbia, Canada. It connects Queen Charlotte Sound with Johnstone Strait, Discovery Passage and then to the Strait of Georgia and Puget Sound...
, and the Dixon Entrance
Dixon Entrance
The Dixon Entrance is a strait about long and wide in the Pacific Ocean at the International Boundary between the U.S. state of Alaska and the province of British Columbia in Canada. It was named by Joseph Banks for Captain George Dixon, a Royal Navy officer, fur trader, and explorer, who...
. North of depression is the Alexander Archipelago
Alexander Archipelago
The Alexander Archipelago is a long archipelago, or group of islands, of North America off the southeastern coast of Alaska. It contains about 1,100 islands, which are the tops of the submerged coastal mountains that rise steeply from the Pacific Ocean. Deep channels and fjords separate the...
, and to its east it is flanked by the Coast Mountains
Coast Mountains
The Coast Mountains are a major mountain range, in the Pacific Coast Ranges, of western North America, extending from southwestern Yukon through the Alaska Panhandle and virtually all of the Coast of British Columbia. They are so-named because of their proximity to the sea coast, and are often...
and the Washington portion of the Cascade Range
Cascade Range
The Cascade Range is a major mountain range of western North America, extending from southern British Columbia through Washington and Oregon to Northern California. It includes both non-volcanic mountains, such as the North Cascades, and the notable volcanoes known as the High Cascades...
. To its west are the Queen Charlotte Islands
Queen Charlotte Islands
Haida Gwaii , formerly the Queen Charlotte Islands, is an archipelago on the North Coast of British Columbia, Canada. Haida Gwaii consists of two main islands: Graham Island in the north, and Moresby Island in the south, along with approximately 150 smaller islands with a total landmass of...
, including the Queen Charlotte Mountains
Queen Charlotte Mountains
The Queen Charlotte Mountains are a mountain range comprising all mountains and small mountain ranges of Haida Gwaii , British Columbia, Canada. It is the northernmost subrange of the Insular Mountains...
and Nahwitti Depression, and the Vancouver Island Ranges
Vancouver Island Ranges
The Vancouver Island Ranges, formerly called the Vancouver Island Mountains, is a mountain range extending along the length of Vancouver Island which has an area of 31,788 km² . The Vancouver Island Ranges comprise the central and largest part of the island...
and the Olympic Mountains
Olympic Mountains
The Olympic Mountains is a mountain range on the Olympic Peninsula of western Washington in the United States. The mountains, part of the Pacific Coast Ranges, are not especially high - Mount Olympus is the highest at - but the western slopes of the Olympics rise directly out of the Pacific...
in Washington Strait
Washington Strait
Washington Strait is a passage 3 miles wide between Fredriksen and Powell Islands on the west and Laurie Island and several smaller islands on the east, in the South Orkney Islands...
. The Trough includes the Puget Lowland (see Puget Sound basin
Puget Sound region
The Puget Sound region is an inland area of the Pacific Northwest in Washington , including Puget Sound, the Puget Sound lowlands, and the surrounding region roughly west of the Cascade Range and east of the Olympic Mountains.- History :...
).
See also
- List of physiogeographic regions of British Columbia
- Royal eponyms in CanadaRoyal eponyms in CanadaIn Canada, a number of sites and structures are named for royal individuals, whether a member of the past French Royal Family, British Royal Family, or present Canadian Royal Family, thus reflecting the country's status as a constitutional monarchy under the Canadian Crown.-King Francis I:-Queen...