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Hillwood Volcano
Hillwood Volcano is an extinct volcano located near Hillwood In Northern Tasmania Australia With an elevation of above sea level. Geology The Hillwood Volcano is a stratovolcano A stratovolcano, also known as a composite volcano, is a conical volcano built up by many layers (strata) of hardened lava and tephra. Unlike shield volcanoes, stratovolcanoes are characterized by a steep profile with a summit crater and per .... The last eruption was 250 million years ago. References {{Reflist Volcanoes of Tasmania Inactive volcanoes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tamar River
The Tamar River, officially kanamaluka / River Tamar, is a estuary located in northern Tasmania, Australia. Despite being called a river, the waterway is a brackish and tidal estuary over its entire length. Location and features Formed by the confluence of the North Esk and South Esk rivers at , kanamaluka / River Tamar flows generally north towards its mouth at Low Head, north of the settlement George Town and into the Bass Strait via Port Dalrymple. kanamaluka / River Tamar has several minor tributaries including the Supply River. Low Head Lighthouse is located at the tip of a peninsula, on the east side of the mouth of the river. The only full crossing of the river is the Batman Bridge in the relatively remote area of Sidmouth, around halfway up the river. The Tamar river is complicated in that it silts up frequently, a contributing factor to its slow decline in use. Over time dredging operations have been required. A scheme enacted between the 1920s and 1970s planned ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tasmania
) , nickname = , image_map = Tasmania in Australia.svg , map_caption = Location of Tasmania in AustraliaCoordinates: , subdivision_type = Country , subdivision_name = Australia , established_title = Before federation , established_date = Colony of Tasmania , established_title2 = Federation , established_date2 = 1 January 1901 , named_for = Abel Tasman , demonym = , capital = Hobart , largest_city = capital , coordinates = , admin_center = 29 local government areas , admin_center_type = Administration , leader_title1 = Monarch , leader_name1 = Charles III , leader_title2 = Governor , leader_name2 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hillwood, Tasmania
Hillwood is a small town approximately north of Launceston. Hillwood is known for its Hillwood Berry Farm, Millers Orchard, Egg Island and various amenities including a sports oval which is used by the Hillwood Sharks Football Club in the NTFA. The 2016 census determined a population of 578 for the state suburb of Hillwood. History Hillwood was gazetted as a locality in 1967. Geography The Tamar River forms the western and northern boundaries. Road infrastructure The East Tamar Highway (A8) enters from the south-east and runs through to the north-east where it exits. The Batman Highway (B73) starts from an intersection with A8 and runs west to the Batman Bridge The Batman Bridge is a modern road bridge that carries the Batman Highway across the Tamar River, between Whirlpool Reach, Hillwood at its eastern end and Sidmouth / Deviot midpoint at its western end, in north Tasmania, Australia. The bridge c ..., where it exits. Route C727 (Hillwood Jetty Road / Craigburn Road) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Australian Height Datum
The Australian Height Datum was introduced in 1971 as the official vertical datum for Australia, and thereby serves as the benchmark to which all height measurements are referred. The Australian Height Datum is an amalgamation of decades of spirit levelling work conducted by numerous state and territory authorities across the country, and was corrected to align with the mean sea level observations of thirty tide gauges positioned around the entire coastline. While it remains the published vertical datum for all surveying and engineering operations performed throughout Australia, newer technologies have uncovered numerous deficiencies, offsets and distortions within the Australian Height Datum, leading to discussions about defining a new Australian vertical datum. Background The National Mapping Council (pre-1945) Prior to the creation of the Australian Height Datum, levelling surveys were carried out by professional surveyors for construction and mapping purposes using only ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stratovolcano
A stratovolcano, also known as a composite volcano, is a conical volcano built up by many layers (strata) of hardened lava and tephra. Unlike shield volcanoes, stratovolcanoes are characterized by a steep profile with a summit crater and periodic intervals of explosive eruptions and effusive eruptions, although some have collapsed summit craters called calderas. The lava flowing from stratovolcanoes typically cools and hardens before spreading far, due to high viscosity. The magma forming this lava is often felsic, having high-to-intermediate levels of silica (as in rhyolite, dacite, or andesite), with lesser amounts of less-viscous mafic magma. Extensive felsic lava flows are uncommon, but have travelled as far as . Stratovolcanoes are sometimes called composite volcanoes because of their composite stratified structure, built up from sequential outpourings of erupted materials. They are among the most common types of volcanoes, in contrast to the less common shield volca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Volcanoes Of Tasmania
A volcano is a rupture in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface. On Earth, volcanoes are most often found where tectonic plates are diverging or converging, and most are found underwater. For example, a mid-ocean ridge, such as the Mid-Atlantic Ridge, has volcanoes caused by divergent tectonic plates whereas the Pacific Ring of Fire has volcanoes caused by convergent tectonic plates. Volcanoes can also form where there is stretching and thinning of the crust's plates, such as in the East African Rift and the Wells Gray-Clearwater volcanic field and Rio Grande rift in North America. Volcanism away from plate boundaries has been postulated to arise from upwelling diapirs from the core–mantle boundary, deep in the Earth. This results in hotspot volcanism, of which the Hawaiian hotspot is an example. Volcanoes are usually not created where two tectonic plates slide pa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
