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Toronto Ravine System
The Toronto ravine system is a distinctive feature of the city's geography, consisting of a network of deep ravines, which forms a large urban forest that runs through most of Toronto. The ravine system is the largest in any city in the world, with the ''Ravine and Natural Feature Protection Bylaw'' protecting approximately of public and privately-owned land. The ravine system has been presented as a central characteristic of the city, with the size of the ravine system leading Toronto to be described as "a city within a park". The ravine system began to take shape approximately 12,000 years ago at the end of the Last Glacial Period when the glaciers that once covered Toronto retreated northeast, leaving rivers and valleys in their place. Due to the topography of the ravine system, limited urban development occurred within it until the mid-19th century. During the late 19th and early 20th centuries, the ravine system underwent a number of changes and saw several infrastructure d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rouge River (Ontario)
The Rouge River is a river in Markham, Pickering, Richmond Hill and Toronto in the Greater Toronto Area of Ontario, Canada. The river flows from the Oak Ridges Moraine to Lake Ontario at the eastern border of Toronto, and is the location of Rouge Park, the only national park in Canada within a municipality. At its southern end, the Rouge River is the boundary between Toronto and southwestern Pickering in the Regional Municipality of Durham. History The Rouge River is part of the Carolinian life zone that is found in Southern Ontario. After the eradication of both the Petun and the Wyandot (Huron), Senecas from New York attempted to establish/expand their fur trade activities by establishing a village named ''Gandechiagaiagon'' (recorded variously as "Gandatsekiagon", "Ganatsekwyagon", "Gandatchekiagon", or "Katabokokonk"), meaning "sand-cut" at the mouth of Rouge River. According to a 1796 list by English surveyor Augustus Jones, the Mississauga name for the river was ''Gi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lake Admiralty
Admiralty Lake was a proglacial lake in the basin of what is now Lake Ontario. The shoreline of Admiralty Lake was about lower than Lake Ontario. The shoreline of Glacial Lake Iroquois, an earlier proglacial lake, was much higher than Lake Ontario's, because a lobe of the Laurentian Glacier blocked what is now the valley of the St Lawrence River. Lake Iroquois drained over the Niagara Escarpment, and down the Mohawk River. When the lobe of the glacier retreated the weight of the glacier kept the outlet of the St Lawrence River lower than the current level. As the glacier continued to retreat the region of the Thousand Islands rebounded, and the lake filled to its current level. References Bibliography *"Nearshore Geology". Aquatichabitat.ca. Archived from the original on 2012-01-27. *J Terasmae, E Mirynech (1964). "Postglacial chronology and the origin of deep lake basins in Prince Edward County, Ontario". Conference on Great Lakes Research, 1964 - International Associa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taddle Creek
Taddle Creek is a buried stream in Toronto, Ontario, Canada that flowed a southeasterly course about six kilometres long, from St. Clair Avenue west of Bathurst Street through the present site of Wychwood Park, through the University of Toronto, into the Toronto Harbour near the Distillery District. During the 19th century, it was buried and converted into an underground sewer, but traces of the creek can still be found today. The scenic footpath known as Philosopher's Walk follows the ravine created by the creek from the Royal Ontario Museum to Trinity College. ''Taddle Creek'' is also the name of a Toronto literary magazine and of a local Montessori school. History In the 1790s, the original town site of the Town of York was established along its south bank. Its waters would be used by its first industries. The disappearance of the creek came in phases in the 19th century: * east of Church Street - before 1860 * Elizabeth Street to Church Street - early 1866 * University of To ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Garrison Creek (Ontario)
Garrison Creek was a short stream about long that flowed southeast into the west side of Toronto Harbour in Ontario, Canada. It has been largely covered over and filled in, but geographical traces of the creek can still be found, including the natural amphitheatre known as Christie Pits and the off-leash dog "bowl" of Trinity Bellwoods Park. The name ''"Garrison Creek"'' was used because Fort York was built near the creek mouth. Volunteers lead popular tours of the course of the old watershed. History Garrison Creek was one of a number of small natural watercourses on the site of the current city of Toronto. Starting in the 1870s, the stream was diverted into underground sewers under city streets and the original course was filled in with soil. By 1920, the stream was entirely diverted into the sewer system. There are many artifacts of the Creek's existence, including buried bridges along Harbord Street and Crawford Street south of Dundas Street. The unusual courses of Niagar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Downtown Toronto
Downtown Toronto is the main central business district of Toronto, Ontario, Canada. Located entirely within the district of Old Toronto, it is approximately 16.6 square kilometres in area, bounded by Bloor Street to the northeast and Dupont Street to the northwest, Lake Ontario to the south, the Don Valley River, Don Valley to the east, and Bathurst Street, Toronto, Bathurst Street to the west. It is also the home of the municipal government of Toronto and the Government of Ontario. The area is made up of Canada's largest concentration of skyscrapers and businesses that form Toronto's skyline. Downtown Toronto has the third most skyscrapers in North America exceeding in height, behind Midtown Manhattan, Midtown Manhattan, New York City and the Chicago Loop. Neighbourhoods The retail core of the downtown is located along Yonge Street from Queen Street to College Street. There is a large cluster of retail centres and shops in the area, including the Toronto Eaton Centre indoor m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Port Lands
The Port Lands (also known as Portlands) of Toronto, Ontario, Canada are an industrial and recreational neighbourhood located about 5 kilometres south-east of downtown, located on the former Don River delta and most of Ashbridge's Bay. Approximate geographical borders are the Gardiner Expressway/Don Valley Parkway ramps to the north and west, Lake Shore Boulevard to the north, Lake Ontario on the three remaining sides: the Inner Harbour to the west, Ashbridge's Bay to the east and the open waters of Lake Ontario to the south. Landmarks include the Portlands Energy Centre, Leslie Barns (streetcar facility), Ashbridges Bay Wastewater Treatment Plant, and the now out of service Hearn Generating Station. There is also parkland such as Cherry Beach and the Leslie Spit. History Ashbridges Bay Marsh once existed at the delta of the Don River in Toronto. The marsh extended as far east as today's Leslie Street. Much of the Port Lands were initially part of Ashbridge's Bay, which cons ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Subterranean River
A subterranean river is a river that runs wholly or partly beneath the ground surface – one where the riverbed does not represent the surface of the Earth. It is distinct from an aquifer, which may flow like a river but is contained within a permeable layer of rock or other unconsolidated materials. A river flowing below ground level in an open gorge is not classed as subterranean. Subterranean rivers may be entirely natural, flowing through cave systems. In karst topography, rivers may disappear through sinkholes, continuing underground. In some cases, they may emerge into daylight further downstream. The longest subterranean river in the world is the Sistema Sac Actun cave system in Mexico. Subterranean rivers can also be the result of covering over a river or diverting its flow into culverts, usually as part of urban development.Richard J. Heggen: Underground Rivers from the River Styx to the Rio San Buenaventura with Occasional Diversions'', University of New Mexico. Rever ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
York, Upper Canada
York was a town and second capital of the colony of Upper Canada. It is the predecessor to the Old Toronto, old city of Toronto (1834–1998). It was established in 1793 by Lieutenant-Governor John Graves Simcoe as a "temporary" location for the capital of Upper Canada, while he made plans to build a capital near today's London, Ontario. Simcoe renamed the location York after Prince Frederick, Duke of York and Albany, George III of the United Kingdom, George III's second son. Simcoe gave up his plan to build a capital at London, and York became the permanent capital of Upper Canada on February 1, 1796. That year Simcoe returned to Britain and was temporarily replaced by Peter Russell (politician), Peter Russell. The original townsite was a compact ten blocks near the mouth of the Don River (Ontario), Don River and a Fort York, garrison was built at the channel to Toronto Harbour. Government buildings and a law court were established. Yonge Street was built, connecting York to th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Castle Frank, By Elizabeth Simcoe, 1796-Archives-of-Ontario
A castle is a type of fortified structure built during the Middle Ages predominantly by the nobility or royalty and by military orders. Scholars debate the scope of the word ''castle'', but usually consider it to be the private fortified residence of a lord or noble. This is distinct from a palace, which is not fortified; from a fortress, which was not always a residence for royalty or nobility; from a ''pleasance'' which was a walled-in residence for nobility, but not adequately fortified; and from a fortified settlement, which was a public defence – though there are many similarities among these types of construction. Use of the term has varied over time and has also been applied to structures such as hill forts and 19th-20th century homes built to resemble castles. Over the approximately 900 years when genuine castles were built, they took on a great many forms with many different features, although some, such as curtain walls, arrowslits, and portcullises, were ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wetland
A wetland is a distinct ecosystem that is flooded or saturated by water, either permanently (for years or decades) or seasonally (for weeks or months). Flooding results in oxygen-free (anoxic) processes prevailing, especially in the soils. The primary factor that distinguishes wetlands from terrestrial land forms or Body of water, water bodies is the characteristic vegetation of aquatic plants, adapted to the unique anoxic hydric soils. Wetlands are considered among the most biologically diverse of all ecosystems, serving as home to a wide range of plant and animal species. Methods for assessing wetland functions, wetland ecological health, and general wetland condition have been developed for many regions of the world. These methods have contributed to wetland conservation partly by raising public awareness of the functions some wetlands provide. Wetlands occur naturally on every continent. The water in wetlands is either freshwater, brackish or seawater, saltwater. The main w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lagoon
A lagoon is a shallow body of water separated from a larger body of water by a narrow landform, such as reefs, barrier islands, barrier peninsulas, or isthmuses. Lagoons are commonly divided into ''coastal lagoons'' (or ''barrier lagoons'') and ''atoll lagoons''. They have also been identified as occurring on mixed-sand and gravel coastlines. There is an overlap between bodies of water classified as coastal lagoons and bodies of water classified as estuaries. Lagoons are common coastal features around many parts of the world. Definition and terminology Lagoons are shallow, often elongated bodies of water separated from a larger body of water by a shallow or exposed shoal, coral reef, or similar feature. Some authorities include fresh water bodies in the definition of "lagoon", while others explicitly restrict "lagoon" to bodies of water with some degree of salinity. The distinction between "lagoon" and "estuary" also varies between authorities. Richard A. Davis Jr. restrict ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spit (landform)
A spit or sandspit is a deposition bar or beach landform off coasts or lake shores. It develops in places where re-entrance occurs, such as at a cove's headlands, by the process of longshore drift by longshore currents. The drift occurs due to waves meeting the beach at an oblique angle, moving sediment down the beach in a zigzag pattern. This is complemented by longshore currents, which further transport sediment through the water alongside the beach. These currents are caused by the same waves that cause the drift. Hydrology and geology Where the direction of the shore inland ''re-enters'', or changes direction, for example at a headland, the longshore current spreads out or dissipates. No longer able to carry the full load, much of the sediment is dropped. This is called deposition. This submerged bar of sediment allows longshore drift or littoral drift to continue to transport sediment in the direction the waves are breaking, forming an above-water spit. Without the co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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