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Marcus Passage
Marcus Passage is a stretch of saltwater on the North Coast region of British Columbia, Canada, offshore from the mouth of the Skeena River, south and west of Smith Island. Marcus Passage connects Chatham Sound with Telegraph Passage. The south side of Marcus Passage is defined by an extensive drying bank called Base Sand (locally known as Wilson Bar). Hydrography The easterly tidal flood attains a rate of , and the westerly tidal ebb can stream at up to . Two shoals obstruct Marcus Passage, the first extends from De Horsey Passage to Base Sand, the second extends from De Horsey Island to Kennedy Island. Sand waves with amplitudes of are known on these shoals. See also *Inside Passage *Chatham Sound *Skeena river The Skeena River is the second-longest river entirely within British Columbia, Canada (after the Fraser River). Since ancient times, the Skeena has been an important transportation artery, particularly for the Tsimshian and the Gitxsan—whose n ... Refer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Smith Island (British Columbia)
Smith Island is an island just north of the mouth of the Skeena River in the North Coast region of British Columbia, Canada. To the south of the island is Marcus Passage. To the north is Inverness Passage, separating Smith Island from the Tsimpsean Peninsula. Eleanor Passage, connects Osborn Point, the most eastern point on the island, with the mouth of the Skeena River. De Horsey Passage separates De Horsey Island from Smith Island on the latter's east side. Croasdaile Island is to the south of the southern tip of Smith Island. Geography Mount McGrath, facing Chatham Sound is a notable feature of the east side of the island. Tsum Tsadai Inlet is a narrow inlet on the north side of the island, with its opening to the west. The inlet provides a well protected anchorage for small craft, but should be approached with caution at slack tide, as a group of drying reefs surround the approach, and tidal currents upwards of are known at the entrance. Settlements Dashken Indian ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tide
Tides are the rise and fall of sea levels caused by the combined effects of the gravity, gravitational forces exerted by the Moon (and to a much lesser extent, the Sun) and are also caused by the Earth and Moon orbiting one another. Tide tables can be used for any given locale to find the predicted times and amplitude (or "tidal range"). The predictions are influenced by many factors including the alignment of the Sun and Moon, the #Phase and amplitude, phase and amplitude of the tide (pattern of tides in the deep ocean), the amphidromic systems of the oceans, and the shape of the coastline and near-shore bathymetry (see ''#Timing, Timing''). They are however only predictions, the actual time and height of the tide is affected by wind and atmospheric pressure. Many shorelines experience semi-diurnal tides—two nearly equal high and low tides each day. Other locations have a diurnal cycle, diurnal tide—one high and low tide each day. A "mixed tide"—two uneven magnitude ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Skeena River
The Skeena River is the second-longest river entirely within British Columbia, Canada (after the Fraser River). Since ancient times, the Skeena has been an important transportation artery, particularly for the Tsimshian and the Gitxsan—whose names mean "inside the Skeena River" ,and "people of the Skeena River," respectively. The river and its basin sustain a wide variety of fish, wildlife, and vegetation, and communities native to the area depend on the health of the river. The Tsimshian migrated to the Lower Skeena River, and the Gitxsan occupy territory of the Upper Skeena. During the Omineca Gold Rush, steamboat services ran from the sea to Hazelton, which was the jumping-off point for the trails to the goldfields. The Hudson's Bay Company established a major trading post on the Skeena at what became called Port Simpson, British Columbia (''Lax Kw'alaams''), where nine tribes of the Tsimshian nation settled about 1834. Other tribes live elsewhere in BC, and descendants of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Inside Passage
The Inside Passage (french: Passage Intérieur) is a coastal route for ships and boats along a network of passages which weave through the islands on the Pacific Northwest coast of the North American Fjordland. The route extends from southeastern Alaska in the United States, through western British Columbia in Canada, to northwestern Washington state in the United States. Ships using the route can avoid some of the bad weather in the open ocean and may visit some of the many isolated communities along the route. The Inside Passage is heavily travelled by cruise ships, freighters, tugs with tows, fishing craft, pleasure craft, and ships of the Alaska Marine Highway, BC Ferries, and Washington State Ferries systems. Coast Guard vessels of both Canada and the United States patrol and transit in the Passage. The term "Inside Passage" is also often used to refer to the ocean and islands around the passage itself. Route It is generally accepted that the southernmost point of the I ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sand Waves
A sand wave is a lower regime sedimentary structure that forms across from tidal currents. Formation Sand waves are formed through the action of the wind or water (through waves or tidal currents). Sand waves form also underwater. See also * Sand dune * Ripple marks In geology, ripple marks are sedimentary structures (i.e., bedforms of the lower flow regime) and indicate agitation by water (current or waves) or wind. Defining ripple cross-laminae and asymmetric ripples * ''Current ripple marks'', ''unidi ... References External links Sedimentology Patterned grounds Sedimentary structures {{geology-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
De Horsey Island
De Horsey Island is an island at the mouth of the Skeena River in the North Coast region of British Columbia, Canada, immediately south of the southern tip of the Tsimpsean Peninsula and immediately east of Smith Island. Separating it from that island is De Horsey Passage; and to its north, separating it from the Tsimpsean Peninsula, is Eleanor Passage. Kshaoom Indian Reserve No. 23 is on its northwest tip. Name origin The island was named in 1877 for Rear Admiral Algernon Frederick Rous de Horsey, commander in chief on the Pacific Station from 1876 to 1879. His flagship was , 26 guns, under Captain Bedford. 'British Columbia Coast Names 1592-1906, their origin and history'', Capt John T. Walbran Ottawa, 1909 quote in BC Names entry See also *List of islands of British Columbia This is a list of islands of British Columbia. South Coast Vancouver Island *Vancouver Island Gulf of Georgia Gulf Islands =Southern Gulf Islands= *Brethour Island * Cabbage Island * Cur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
De Horsey Passage
De Horsey Passage is a short strait in the North Coast of British Columbia, Canada, separating De Horsey Island to the east from Smith Island to the west. The passage, like the island, was named for Rear Admiral Algernon Frederick Rous de Horsey, commander in chief on this station from 1876 to 1879. His flagship A flagship is a vessel used by the commanding officer of a group of naval ships, characteristically a flag officer entitled by custom to fly a distinguishing flag. Used more loosely, it is the lead ship in a fleet of vessels, typically the fi ... was , 26 guns, under Captain Bedford. 'British Columbia Coast Names 1592-1906, their origin and history'', Capt John T. Walbran Ottawa, 1909 quote in BC Names entry Kshaoom Indian Reserve No. 23 is on its northwestern end on De Horsey Island. Opposite is Dashken Indian Reserve No. 22, on the eastern trip of Smith Island. References {{coord, 54, 07, 20, N, 130, 10, 03, W, display=title, source:BCNames North Coast of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shoals
In oceanography, geomorphology, and geoscience, a shoal is a natural submerged ridge, bank, or bar that consists of, or is covered by, sand or other unconsolidated material and rises from the bed of a body of water to near the surface. It often refers to those submerged ridges, banks, or bars that rise near enough to the surface of a body of water as to constitute a danger to navigation. Shoals are also known as sandbanks, sandbars, or gravelbars. Two or more shoals that are either separated by shared troughs or interconnected by past or present sedimentary and hydrographic processes are referred to as a shoal complex.Neuendorf, K.K.E., J.P. Mehl Jr., and J.A. Jackson, eds. (2005) ''Glossary of Geology'' (5th ed.). Alexandria, Virginia, American Geological Institute. 779 pp. The term ''shoal'' is also used in a number of ways that can be either similar or quite different from how it is used in geologic, geomorphic, and oceanographic literature. Sometimes, this term refers ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kennedy Island (British Columbia)
Kennedy Island (local name Kasolo Island, also known as Plum Pudding Island), is a , uninhabited island in Solomon Islands that was named after John F. Kennedy, following an incident involving Kennedy during his World War II naval career. Kennedy Island lies 15 minutes by boat from Gizo, the provincial capital of the Western Province of Solomon Islands. History ''PT-109'' incident The island is notable for its role in the story of ''PT-109'', part of the Pacific Ocean theater of World War II. In August 1943, it was to this island that the crew of the ship, commanded by then Lieutenant Kennedy, swam after their craft was rammed and sunk by the Japanese destroyer ''Amagiri''. Two American sailors died in the incident. Kennedy later had the crew swim to the larger Olasana Island where they were found and helped by Melanesian scouts, Biuku Gasa and Eroni Kumana, dispatched by coastwatcher Reg Evans. A small shrine to Kennedy, built by Solomon Islander Eroni Kumana who aided in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Telegraph Passage
Telegraphy is the long-distance transmission of messages where the sender uses symbolic codes, known to the recipient, rather than a physical exchange of an object bearing the message. Thus flag semaphore is a method of telegraphy, whereas pigeon post is not. Ancient signalling systems, although sometimes quite extensive and sophisticated as in China, were generally not capable of transmitting arbitrary text messages. Possible messages were fixed and predetermined and such systems are thus not true telegraphs. The earliest true telegraph put into widespread use was the optical telegraph of Claude Chappe, invented in the late 18th century. The system was used extensively in France, and European nations occupied by France, during the Napoleonic era. The electric telegraph started to replace the optical telegraph in the mid-19th century. It was first taken up in Britain in the form of the Cooke and Wheatstone telegraph, initially used mostly as an aid to railway signalling. This ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chatham Sound
, image = Looking Northeasterly across Chatham Sound.png , alt = Looking Northeasterly across Chatham Sound , caption = Looking Northeasterly across Chatham Sound , image_bathymetry = , alt_bathymetry = , caption_bathymetry = , location = British Columbia, Canada, between Dundas Islands, Stephens Islands and Tsimpsean Peninsula , group = , coordinates = , type = , etymology = , part_of = , inflow = Nass River, Skeena River , rivers = , outflow = Dixon Entrance, Hecate Strait , oceans = , catchment = , basin_countries = , agency = , designation = , date-built = , engineer = , date-flooded = , length = , width = , area = , depth = , max-depth = , volume ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
