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matching volcanic geology
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The Beechworth Burke Museum
Geological specimen - Slice Dendrites on Sandstone, Unknown
Dendrites are deposits of black minerals, typically manganese oxides that precipitated from water seeping through fractures in fine-grain rocks like a sandstone or limestone. Dendrites are much less regular than plant fossils and lacks vein structures. The manganese cryztallizes through the process called 'supercooling'. Some samples of dendrites occur in volcanic rocks in the Lilydale district, east of Melbourne. Sandstones are made of tiny sand grains that may have been deposited in the sea and later formed together. Most sandstones are made of quartz which are chemically-resistant minerals. This particular specimen was donated by Alfred Selwyn in 1868 as part of the Geological Survey of Victoria. It is connected to the original 1875 catalogue on Geological Specimen with number 189 'Quartz Crystals_Quartz Crystals (two are polished)'Dendrites on sandstones This specimen is an important contribution to the geological history of Victoria, as well as its links to the 1868 Geological Survey of Victoria. This specimen is part of larger collection of significant geological specimens in the Burke Museum that was collected from around the world between 1868-1880. A large percentage of these specimens were collection as part of the Geological Survey of Victoria 1852-1974. The Geological Survey of Victoria was an organisation founded in response to the Victorian gold rush to explore the geological and mineral resources and to record a detailed map of the state. It was headed by British geologist, Alfred Richard Cecil Selwyn (1824-1902), who was responsible for issuing over 60 geological maps during his 17 years as director. These maps were all hand-drawn and coloured and became the benchmark for accuracy for geological mapping. Collecting geological specimens was an important part of mapping and understanding the scientific makeup of the earth. Many of these specimens were sent to research and collecting organisations across Australia, including the Burke Museum, to educate and encourage further study. A hand-sized slice of light brown sandstone with dendrites formed from crystallized manganese oxide.Existing label: Not sure what / 'Slica dondrites' / means. / Sample is sandstone and original label / identifies it as from / the Grampians near Stawell. / C. Willman / 15/4/21 Other label: [illegible] / stone [ illegible] / from Grampians Stawell / 1894 /geological specimen, geology, geology collection, burke museum, beechworth, dendrites, sandstones, quartz, lilydale district, geological survey of victoria, grampians, victoria rocks, minerals, rocks, manganese oxides, alfred selwyn -
The Beechworth Burke Museum
Geological specimen - Thunderegg agates, Unknown
Thunderegg Agates are formed within rhyolite volcanic ash layers. They are rough spherical shapes, varying in size from less than an inch to over a metre long. Thundereggs usually contain centres of chalcedony which may have been fractured followed by deposition of agate, jasper or opal, either uniquely or in combination. A unique characteristic that these specimens have is the fact that they often look like ordinary rocks on the outside, but slicing them in half and polishing them may reveal intricate patterns and colours. These particular specimens are examples of thunderegg agates. Agate is a variety of chalcedony, a cryptocrystalline form of quartz. The agate component contributes to the intriguing internal patterns of the specimens. The specific locality of these specimens is unknown but they can be found in flows of rhyolite lava. They are formed in gas pockets in the lava, which act as moulds. These specimens can be found globally, with specific locations in Germany being particularly abundant. This specimen is part of a larger collection of geological and mineral specimens collected from around Australia (and some parts of the world) and donated to the Burke Museum between 1868-1880. A large percentage of these specimens were collected in Victoria as part of the Geological Survey of Victoria that begun in 1852 (in response to the Gold Rush) to study and map the geology of Victoria. Collecting geological specimens was an important part of mapping and understanding the scientific makeup of the earth. Many of these specimens were sent to research and collecting organisations across Australia, including the Burke Museum, to educate and encourage further study.Two small solid specimens with pale, sandy-coloured exteriors and fractured internal patterns. burke museum, beechworth, geological, geological specimen, thundereggs, thundereggs agate, agate, rhyolite, rhyolite lava, volcanic ash, chalcedony, cryptocrystalline -
The Beechworth Burke Museum
Geological specimen - Olivine Crystals, Unknown
Olivine is mostly found on the Earth's surface in igneous rocks that are dark-coloured. It is common at divergent plate boundaries and at warm spots, such as volcanic areas. It crystalises and forms during the cooling of magma. Olivine is used in refractory sand, bricks, and gemstones. Olivine has been found on a number of meteorites, which might have originated from large asteroids or the mantle of a now-destroyed planet. This olivine crystal is thought to originate from Mount Noorat, with speculation that it could have originated from Mount Shadwell. Mount Noorat is a dormant volcano cone located in the Newer Volcanics Province of Victoria. Mount Noorat belongs to the Kirrae Wuurong people, who used the Mount as a place for meetings and gatherings prior to European settlement. Contact was first made between European settlers and the Indigenous people in 1841. The Mount has mostly been used for cattle and sheep grazing. Mount Shadwell is a well-known source of olivine and is the highest of a gathering of volcanic cones. The New Volcanic Province is located in South East Australia and covers 15000 square kilometres. It contains 400 explosive vents and small shield volcanoes. The last eruption is thought to have occurred 5000 years ago at Mount Gambier and Mount Schank. This olivine crystal has been identified as a volcanic bomb, which is a molten rock which was pushed out and ejected into the air when a volcano reupts. A rock needs to be larger than 65 mm in diameter to be classified as a volcanic bomb. This olivine volcanic bomb and its locality is historically and socially significant. The olivine was found in the Newer Volcanic Province, an area which contains over 400 dormant volcanoes. This olivine is one part of a volcanic bomb, which would have ejected when magma erupted out of a volcano. This specimen is part of a larger collection of geological and mineral specimens collected from around Australia (and some parts of the world) and donated to the Burke Museum between 1868-1880. A large percentage of these specimens were collected in Victoria as part of the Geological Survey of Victoria that begun in 1852 (in response to the Gold Rush) to study and map the geology of Victoria. Collecting geological specimens was an important part of mapping and understanding the scientific makeup of the earth. Many of these specimens were sent to research and collecting organisations across Australia, including the Burke Museum, to educate and encourage further study.A solid iron-magnesium silicate mineral with shades of green and brownburke museum, beechworth, geological, geological specimen, olivine, igneous rock, volcanic, gemstones, volcanic bomb, meteorites, asteroids, plantes, mount noorat, mount shadwell, indigenous, kirrae wuurong people, newer volcanics province, victoria, european settlement, eruption -
Federation University Historical Collection
Plan - Map, Mines Department, Parish of Narmbool and part of Cargerie, County of Grant, 1892, 06/1992
This map shows the position of the homestead on the Narmbool Pre-emptive Right, volcanic craters, stock reserve, quarry and geological eras,Geological map showing Narmbool and part of Cargerie in the County of Grant in five colours, predominantly pink.narmbool, cargerie, narmbool pre-emptive right, williamson's creek, leigh river, green hill, collyer's hill, volcano, crater, krause, ferdinand krause -
Ballarat Heritage Services
Digital photograph, Lisa Gervasoni, Cape Bridgewater, c2015
cape bridgewater, geology, ocean, coastal, landscape, seascape, blowhole, volcanic rock -
Ballarat Heritage Services
Digital photograph, Lisa Gervasoni, Cape Bridgewater, c2015
Colour photograph of the coastline at Cape Bridgewater, Victoria. cape bridgewater, geology, ocean, coastal, landscape, seascape, blowhole, volcanic rock -
Ballarat Heritage Services
Digital photograph, Lisa Gervasoni, Cape Bridgewater, c2015
cape bridgewater, geology, ocean, coastal, landscape, seascape, blowhole, volcanic rock -
Ballarat Heritage Services
Digital photograph, Lisa Gervasoni, Cape Bridgewater, c2015
cape bridgewater, geology, ocean, coastal, landscape, seascape, blowhole, volcanic rock -
Ballarat Heritage Services
Digital photograph, Lisa Gervasoni, Cape Bridgewater, c2015
cape bridgewater, geology, ocean, coastal, landscape, seascape, blowhole, volcanic rock -
Sunbury Family History and Heritage Society Inc.
Photograph, Bulla Primary School, Hanging Rock, 1995
... . Hanging Rock is an important geological and volcanic structure ...In 1995, the upper school students from Bulla Primary School attended a camp at Hanging Rock Reserve which is part of the Macedon Ranges. At this camp the students were shown basic rock climbing skills and explored the rock for its interesting geological formations. Hanging Rock, also known as Mount Diogenes, is the traditional land of the Dja Dja Wurrung, Woi Wurrung and Taungurung people. It is a mamelon formed when magma poured from a vent and congealed. There are interesting rock functions at the site such as the Colonnade, the Eagle and the UFO. The highest point on the rock is 718metres above sea level and 105 meters above the land at its base.Hanging Rock is an important geological and volcanic structure in the Macedon Ranges area and in central Victoria. A non-digital coloured photograph of three holiday cabins and a barbecue in a bushland setting. A red car is parked outside one of the cabins as well as two permanent picnic tables.hanging rock, mount diogenes, mamelons, volcanoes, school camps, bulla primary school -
Melton City Libraries
Newspaper, Stone Walls protected, 2015
Dry stone construction as a technique is used for much more than paddock walls. Across the volcanic plains of western Victoriaare marvelous sheep dips, stock loading ramps, huts, dams, retaining walls, and the rich and largely undiscovered heritage of indigenous dry stone structures. Dry stone walls indicate many aspects of our rural environment; the geological beginnings of the way the landscape was created, the patterns of early settlement by pastoralists and squatters, the types of stock that grazed the land and the methods of cattle and sheep management, of the efforts to thwart the spread of rabbits .... "For the casual but interested observer dry stone walls are good to look at, to photograph, to get up alongside and see the way they are constructed, to appreciate the varying shapes and sizes of stones and learn of the techniques of keeping often quite rounded stones in place. Apart from walls and other dry stone structures on grazing land we can also see dry stone techniques used in other places and in other phases of our history. Indigenous Australians have built, and continue to build, structures for shelter or hunting or trapping eels and fish in rivers and estuaries around the country. At spots around our coast line there is evidence of simple stone structures built by early maritime explorers. Prospectors in early mining encampments used dry stone construction to build retaining walls or the low walls of rudimentary shelters. If the future of dry stone walls in the Australian landscape is to be assured. wall owners and local governments have to accept and embrace their custodial role in assuring the preservation and celebration of walls. This is not an easy task, but, along with putting the necessary statutory mechanisms to ensure their retention, it is a task that must be pursued. The Dry Stone Walls Association of Australia has as its primary goal the increase in awareness of wall owners and local governments of the importance of dry stone walls. It also seeks to increase the level of training of skilled and semi skilled wallers, and the gaining of rudimentary skills by farmers so that they can maintain their own walls". Melton Star Weekly article about the Stone Wallslandscapes of significance