tower hill, volcano, volcanic ash, volcanic ash layers, geology, koroit

Colour photographs of the volcanic ash layers at Tower Hill.tower hill, volcanic ash, ash layers

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

Tower Hill is a volcanic formation believed to have erupted about 32,000 years ago. Its formation is known as a "nested maar" and it is the largest example of its type in Victoria. During formation, molten lava pushed its way up through the Earth’s crust and encountered a layer of water-bearing rock. Violent explosions followed creating a shallow crater which later filled with water to form the lake. Further eruptions occurred in the centre of this crater, creating the islands and cone shaped hills. In 1892 Tower Hill became Victoria’s first National Park. In 1961, Tower Hill became a State Game Reserve under the then Fisheries and Wildlife Department and a major re-vegetation program began. (https://www.towerhill.org.au/index.php/about-reserve/history, accessed 23 December 2019)A number of photographs taken at Tower Hill, including the lakes, volcanic ash layer, and koala.tower hill, ash layer, volcano

This particular specimen was found in the Moorabool Slate quarries in Victoria. The Moorabool Slate quarries was established in the 1860’s by a company of Welshmen with a crew of six who purchased land by the riverside to mine for slate. Under the promise of adding to existing recourses the crew mined the slate which was used for paving and roofing. Slate is a fine-grained, low-grade metamorphic rock that is formed by the transformation of mudstone, shale or sometimes volcanic ash under low pressure and temperatures. It dark colour is due to carbonaceous material or to finely divided iron sulphide. It is believed that Evan Rowlands and Theophilus Williams of Ballarat were the first to discover the slate veins. Slate is a one of the most common natural stones in general use. Being used as paving, flooring, roofing and more. However, its history of being mined in Australia is not common as it is considered that the best places to mine slate is Spain and parts of the United Kingdom. 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 somewhat rectangular foliated metamorphic rock composed of quartz, sericite and minerals from the chlorite group that make up the compounds of slate. The rock is dark grey almost black.Geological survey / R S / Loc Moorabool /Slate quarries / 1/4 sheet | 78 | Roofing Slate /burke museum, beechworth, geological, slate, metamorphic, slate (metamorphic), geological specimen, slate specimen, indigo shire

The Tower Hill Reserve is located inside a dormant volcano, and features a lake and wetlands. It became Victoria's first national park in 1892, but by the 1930s the early settlers had cleared much of the land for grazing, cropping and quarrying. In the 1960s the bare hills and islands were revegetated based in species identified from Eugene von Guerard's painting of Tower Hill. Tower Hill was formed around 30,000 years ago in a violent volcanic eruption. The initial eruption created the outer rim of the volcano, and later smaller eruptions formed the internal hills that are evident today. The layers of volcanic ash layers include artefacts relating to indigenous communites.A series of colour digital photographs showing Tower Hill, near Port Fairy, Victoria. Tower Hill is an extinct volcano.tower hill, volcano, extinct

A fossil refers to any remains or traces of past life that are preserved in the rock. It could be remains of plants or animals. Fossil leaves are commonly found on different types of rocks. These fossils can go as far back as the Triassic Age just like the series of fossil plants collected at Denmark Hill, Ipswich in Queensland. Fossils leaves are formed when dead plants get buried by sediments like mud, sand, or volcanic ash. Often, it gets detached cleanly from stems along a special layer of weak cells, then twigs, and, less commonly, cones of conifers and fruits and seeds of flowering plants. Over time, the leaves or pieces of leaves get buried by more sediments and eventually gets 'lithified' or hardened into a rock. Erosions and mining can cause the rocks to break and reveal the fossils buried in it. Fossilisation frequently takes place at sites in the lowlands where deposits of clay, silt, sand are found. This is usually due to weathering and erosion of rocks. Fossil leaves can provide information about ancient Australia's way of living. It contributes to Victorian biodiversity records and its botanical collections. It also contributes information on the geographical profile of Victoria as fossilisation usually occur at estuaries and deltas of rivers, river flood plains, ponds and lakes. 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.Piece of light brown rock with fossilised leaves in shades of golden yellow and brown.Existing label: Fossil Leaves / Locality unknown / might be worth checking if this is Glossopteris, a Permian age plant. / C. William 16/4/21 geological specimen, geology, geology collection, burke museum, beechworth, fossil leaves, fossilization, 1868 geological survey of victoria, lithified, rocks, fossilised leaf, rock, fossils, leaves

The sharpening stone can also be referred to as a whetstone, oil stone or honing stone. It is a well-worn double-sided sharpening stone retrieved from the wreck site of the Loch Ard. It is used to grind and hone the edges of metal blades and tools. ‘Natural’ sharpening stones like this one are quarried from ancient sedimentary rock that has metamorphosed from clay and volcanic ash to produce garnet crystals. Most modern stones are artificially produced, or ‘bonded’, abrasive stones, made by fusing clay and metal powder under heat and pressure. The softer yellow Corticule stone is found in thin vertical veins running through the more plentiful Belgian Blue rock. Coticule is a fine-grained and dense material that ‘cuts’ metal slowly but to a superior standard of sharpness and finish. The relatively coarser Belgian Blue is stronger and ‘cuts’ more quickly, but with a less polished finish. A double-sided whetstone is therefore valued for its increased durability (the harder BBW ‘backs’, or supports, the softer Coticule), and additional utility (the fine ‘grit’ of Coticule complements the coarser BBW to meet a range of sharpening needs). The blue-grey base of this stone is thinner than the remaining yellow Coticule on top. This suggests that the majority of grinding and honing work it has done on board the ship was for larger tools, rather than on surgical or shaving blades. Its rounded or spherical shaping may also be related to the ‘tumbling’ action of the sea on the ocean floor. History of the Loch Ard wreck: The Loch Ard got its name from ”Loch Ard” a loch that lies to the west of Aberfoyle, and the east of Loch Lomond. It means "high lake" in Scottish Gaelic. The vessel belonged to the famous Loch Line which sailed many vessels from England to Australia. The Loch Ard was built in Glasgow by Barclay, Curle & Co. in 1873, the vessel was a three-masted square-rigged iron sailing ship that measured 79.87 meters in length, 11.58 m in width, and 7 m in depth with a gross tonnage of 1693 tons with a mainmast that measured a massive 45.7 m in height. Loch Ard made three trips to Australia and one trip to Calcutta before its fateful voyage. Loch Ard left England on March 2, 1878, under the command of 29-year-old Captain Gibbs, who was newly married. The ship was bound for Melbourne with a crew of 37, plus 17 passengers. The general cargo reflected the affluence of Melbourne at the time. Onboard were straw hats, umbrellas, perfumes, clay pipes, pianos, clocks, confectionery, linen and candles, as well as a heavier load of railway irons, cement, lead and copper. There were other items included that were intended for display in the Melbourne International Exhibition of 1880. The voyage to Port Phillip was long but uneventful. Then at 3 am on June 1, 1878, Captain Gibbs was expecting to see land. But the Loch Ard was running into a fog which greatly reduced visibility. Captain Gibbs was becoming anxious as there was no sign of land or the Cape Otway lighthouse. At 4 am the fog lifted and a lookout aloft announced that he could see breakers. The sheer cliffs of Victoria's west coast came into view, and Captain Gibbs realised that the ship was much closer to them than expected. He ordered as much sail to be set as time would permit and then attempted to steer the vessel out to sea. On coming head-on into the wind, the ship lost momentum, the sails fell limp and Loch Ard's bow swung back towards land. Gibbs then ordered the anchors to be released in an attempt to hold their position. The anchors sank some 50 fathoms - but did not hold. By this time the ship was among the breakers and the tall cliffs of Mutton Bird Island rose behind. Just half a mile from the coast, the ship's bow was suddenly pulled around by the anchor. The captain tried to tack out to sea, but the ship struck a reef at the base of Mutton Bird Island, near Port Campbell. Waves subsequently broke over the ship and the top deck became loosened from the hull. The masts and rigging came crashing down knocking passengers and crew overboard. When a lifeboat was finally launched, it crashed into the side of Loch Ard and capsized. Tom Pearce, who had launched the boat, managed to cling to its overturned hull and shelter beneath it. He drifted out to sea and then on the flood tide came into what is now known as Lochard Gorge. He swam to shore, bruised and dazed, and found a cave in which to shelter. Some of the crew stayed below deck to shelter from the falling rigging but drowned when the ship slipped off the reef into deeper water. Eva Carmichael a passenger had raced onto the deck to find out what was happening only to be confronted by towering cliffs looming above the stricken ship. In all the chaos, Captain Gibbs grabbed Eva and said, "If you are saved Eva, let my dear wife know that I died like a sailor". That was the last Eva Carmichael saw of the captain. She was swept off the ship by a huge wave. Eva saw Tom Pearce on a small rocky beach and yelled to attract his attention. He dived in and swam to the exhausted woman and dragged her to shore. He took her to the cave and broke the open case of brandy which had washed up on the beach. He opened a bottle to revive the unconscious woman. A few hours later Tom scaled a cliff in search of help. He followed hoof prints and came by chance upon two men from nearby Glenample Station three and a half miles away. In a complete state of exhaustion, he told the men of the tragedy. Tom then returned to the gorge while the two men rode back to the station to get help. By the time they reached Loch Ard Gorge, it was cold and dark. The two shipwreck survivors were taken to Glenample Station to recover. Eva stayed at the station for six weeks before returning to Ireland by steamship. In Melbourne, Tom Pearce received a hero's welcome. He was presented with the first gold medal of the Royal Humane Society of Victoria and a £1000 cheque from the Victorian Government. Concerts were performed to honour the young man's bravery and to raise money for those who lost family in the disaster. Of the 54 crew members and passengers on board, only two survived: the apprentice, Tom Pearce and the young woman passenger, Eva Carmichael, who lost her family in the tragedy. Ten days after the Lochard tragedy, salvage rights to the wreck were sold at auction for £2,120. Cargo valued at £3,000 was salvaged and placed on the beach, but most washed back into the sea when another storm developed. The wreck of Lochard still lies at the base of Mutton Bird Island. Much of the cargo has now been salvaged and some items were washed up into Lochard Gorge. Cargo and artefacts have also been illegally salvaged over many years before protective legislation was introduced in March 1982. One of the most unlikely pieces of cargo to have survived the shipwreck was a Minton majolica peacock- one of only nine in the world. The peacock was destined for the Melbourne 1880 International Exhibition. It had been well packed, which gave it adequate protection during the violent storm. Today the Minton peacock can be seen at the Flagstaff Hill Maritime Museum in Warrnambool. From Australia's most dramatic shipwreck, it has now become Australia's most valuable shipwreck artifact and is one of very few 'objects' on the Victorian State Heritage Register. The shipwreck of the Loch Ard is of significance for Victoria and is registered on the Victorian Heritage Register ( S 417). Flagstaff Hill has a varied collection of artefacts from Loch Ard and its collection is significant for being one of the largest accumulation of artefacts from this notable Victorian shipwreck of which the subject items are a small part. The collections objects give us a snapshot of how we can interpret the story of this tragic event. The collection is also archaeologically significant as it represents aspects of Victoria's shipping history that allows us to interpret Victoria's social and historical themes of the time. Through is associated with the worst and best-known shipwreck in Victoria's history. A sharpening stone is also called a whetstone, oil, or honing stone. The stone is a worn double-sided rectangular block with rounded corners. There is a clear delineation between its coarser Belgian Blue base (grey colour) and its finer Belgian Coticule face (yellow colour). It bears sedimentary encrustation over one-third of its surface. flagstaff hill, warrnambool, shipwrecked coast, flagstaff hill maritime museum, maritime museum, shipwreck coast, flagstaff hill maritime village, great ocean road, loch line, loch ard, captain gibbs, eva carmichael, tom pearce, glenample station, mutton bird island, loch ard gorge, sharpening stone, whetstone, oilstone, double-sided stone, belgian coticule, belgian blue whetstone, oil stone, honing stone