Australian rituals have persisted for 12,000 years, as evidenced by ancient artefacts

Ancient ritual sticks discovered in Australia's Clogs Cave

Gunaikurnai Land and Water Aboriginal Corporation

Wooden artefacts found in Australian caves suggest Aboriginal rituals recorded in the 19th century.Number The ritual is believed to have taken place 12,000 years ago, making it possibly the oldest cultural ceremony in the world.

Between 2019 and 2020, a team of archaeologists and members of the local Indigenous community of Gunaikurnai in southeastern Australia carried out excavations at Clogs Cave, near the Snowy River in Victoria.

The site had been partially excavated in the 1970s, but during new work the team discovered two preserved fireplaces, containing mostly unfired artefacts made from local wood. Casalina Chemical analysis of the wooden remains found showed they were smeared with animal or human fat and dated to between 11,000 and 12,000 years ago, making them some of the oldest wooden artefacts found in Australia.

This alone would have been a major puzzling discovery, but the researchers and local residents were also examining the ethnographic reports of 19 other people.NumberAlfred Howitt was a 20th century cultural anthropologist who studied the customs and traditions of tribes in south-eastern Australia in the 1880s.

In 1887, close to Clogs Cave, he recorded the rituals of the indigenous “wizards”, powerful medicine men of Gunaikurnai, now known as “Mula-Mlang”, who smeared wooden throwing sticks with animal or human fat. Casalina The wood is placed in small ritual fires and used as magical talismans and curses, a ritual he understood to be used against enemies or anyone the ritualist wishes to harm.

“During this time, the wizard would continue to chant the spell – as the saying goes, he would 'sing the man's name' – and when the stick fell, the spell was complete – a practice that continues to this day,” Howitt writes.

Bruno David Monash University in Melbourne Russell MalletThe Gunaikurnai elder said similarities between archaeological finds and ethnographic descriptions led him to believe the same rituals had been taking place for up to 12,000 years.

Mallet said he was convinced of the connection because Howitt's description matched so closely with what was found in the cave — the type of wood and the position of the fat on the sticks were exactly as Howitt described them.

“This will ensure the longevity of our oral traditions and knowledge and the passing of that knowledge from generation to generation,” Mallett says.

David says the conclusions slowly deepened with the discovery of these unusual wood artefacts.

“Archaeologists never see the rituals that were taking place behind these ancient ruins,” he says, “and to me it's really amazing that the physical evidence that matches the cultural knowledge so well has remained so largely intact and for so long. It's exactly what Howitt described.”

“The team's methodology is thorough and excellent.” Paul Tassone At Griffith University, Brisbane, Australia.

According to Tason, these communities have undergone many changes over time, but this ritual appears to have remained constant: “What strikes me about this is that for this same form of ritual to have continued for such a long period of time, it must have been considered important and effective.”

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Source: www.newscientist.com

New research uncovers that the Great Oxidation Event persisted for a minimum of 200 million years

About 2.5 billion years ago, free oxygen first began to accumulate in meaningful levels in Earth's atmosphere, setting the stage for the emergence of complex life. Scientists call this phenomenon Great Oxidation EventBut a new study led by researchers at the University of Utah suggests that Earth's early buildup of oxygen wasn't as simple as that moniker suggests.

The Great Oxidation Event refers to the transition from a slowly reducing Archean atmosphere-ocean system to an oxygen-rich atmosphere and shallow ocean during the early Paleoproterozoic. Image courtesy of Hadeano.

“The new data suggest that the early rise of oxygen in Earth's atmosphere was dynamic, possibly progressing intermittently up until 2.2 billion years ago,” said Dr Chadrin Ostrander, a researcher at the University of Utah.

“Our data validate this hypothesis and go a step further by extending this dynamics to the ocean.”

By analysing stable thallium isotope ratios and redox-sensitive elements, Dr Ostrander and his colleagues found evidence of fluctuations in ocean oxygen levels that are consistent with changes in atmospheric oxygen.

The discovery helps improve understanding of the complex processes that shaped oxygen levels on Earth at key times in its history and paved the way for the evolution of life as we know it.

“We have no idea what was going on in the oceans where Earth's earliest life forms are thought to have arisen and evolved,” Dr Ostrander said.

“So knowing the oxygen content of the ocean and how it evolved over time is probably more important for early life than the atmosphere.”

In 2021, researchers discovered that oxygen wasn't permanently present in the atmosphere until about 200 million years after the global oxygenation process began — much later than previously thought.

Definitive evidence for an anoxic atmosphere is the presence of rare mass-independent sulfur isotope signatures in the sediment record prior to the Great Oxidation Event.

There are very few known processes on Earth that could produce these sulfur isotope signatures, and atmospheric oxygen would almost certainly be absent for them to be preserved in the rock record.

For the first half of Earth's existence, its atmosphere and oceans were almost devoid of oxygen. This gas was likely produced by cyanobacteria in the oceans before the Great Oxidation Event, but during this early epoch the oxygen was rapidly destroyed in reactions with exposed minerals and volcanic gases.

Scientists found that traces of rare sulfur isotopes disappeared and reappeared, suggesting that atmospheric oxygen increased and decreased multiple times during the Great Oxidation Event – it wasn't a single “event.”

“When oxygen began to be produced, the Earth was not ready to be oxygenated. The Earth needed time to evolve biologically, geologically and chemically to encourage oxygenation,” Dr Ostrander said.

“It's like a seesaw. Oxygen is produced, but there's so much oxygen destruction that nothing happens.”

“We're still trying to figure out when the scales will tip completely and Earth will no longer be able to go back to an oxygen-free atmosphere.”

To map ocean oxygen levels during the Great Oxidation Event, the authors relied on expertise in stable thallium isotopes.

Thallium isotope ratios are sensitive to the burial of manganese oxides to the seafloor, a process that requires oxygen in seawater.

The team looked at thallium isotopes in the same ocean shales, which have recently been shown to be able to track fluctuations in atmospheric oxygen during the Great Oxidation Event, along with rare sulfur isotopes.

The researchers found a significant enrichment of the lighter isotope thallium-203 in the shale, a pattern best explained by the burial of manganese oxides on the ocean floor and the buildup of oxygen in the water.

These enrichments were found in the same samples that lacked the rare sulfur isotope signature, meaning the atmosphere was no longer anoxic, and they disappeared once the rare sulfur isotope signature reappeared.

These findings were supported by redox-sensitive element enrichments, a more classical means of tracing ancient oxygen changes.

“The sulfur isotopes indicate that the atmosphere was oxygenated, and the thallium isotopes indicate that the oceans were oxygenated,” Dr Ostrander said.

“Sulfur isotopes indicate that the atmosphere has become anoxic again, and thallium isotopes indicate the same for the oceans.”

“So the atmosphere and oceans were simultaneously oxygenating and deoxygenating. This is new and exciting information for people interested in the ancient Earth.”

of Investigation result Published in the journal Nature.

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Ostrander Commercial othersCoupled oxygenation of the atmosphere and oceans began 2.3 billion years ago. NaturePublished online June 12, 2024, doi: 10.1038/s41586-024-07551-5

Source: www.sci.news