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originally posted by: AndyMayhew
originally posted by: ArMaP
Dust clouds covering the whole planet for a relatively long time would have to eventually land somewhere. That would mean those particles should exist around the whole planet and the layer they would form could easily be dated to more or less that time period, so yes, it's possible for science to recognize something like that, like in the event of a huge volcano eruption.
Indeed. We can date ancient volcanic eruptions from the traces left in ice cores.
For example, the Mount Toba eruption ~75,000 year ago
cp.copernicus.org...
We can prove the Storegga tsunami (~8,000 years ago) from deposits left along British coastlines
www.researchgate.net...
originally posted by: puzzled2
a reply to: JamesChessman
-5c is not cold, heck government heating allowances don't kick in unless its -7c or below for 7 days. -10c is a warm and comfortable day here in January to March.
originally posted by: JamesChessman
Well, are you 100% sure that there's NOT similar evidence for the Younger Dryas Event, having massive dust clouds?
Considering there's not even an exact date for the Event, nor a consensus of what the Event even was, and there's not an exact range of dates for the resulting time period... and also considering that it's a relatively uncommon topic...
...ALSO the Impact Theory (as the cause of the Younger Dryas Event) is already a mainstream theory. I just quoted information about it, in an earlier post:
It's not a fringe theory. It's a normal explanation, within normal mainstream science. It's not a UNANIMOUSLY-accepted theory, but it's one of the MAIN POSSIBLE EXPLANATIONS for what triggered the Younger Dryas Event.
originally posted by: JamesChessman
So if people want to debate whether it was a doomsday or not... we are literally talking about THE LAST ICE AGE.
I think people must not be realizing that, or else it would be impossible to ACTUALLY be arguing about whether the Ice Age was a period of destruction, or not... lol.
But that's the point: if there was a massive dust cloud, it would have left deposits in the polar ice sheets, glaciers and, indeed, ocean beds, around the world, and from those we would be able to date it. Albeit, even with events this recent we can't actually pinpoint the exact year!
Yes, it's an accepted hypothesis - one I have been following since it was first proposed and was initially persuaded by, but have since had my doubts raised by conflicting and contrary evidence.
The Younger Dryas impact hypothesis
In 2006, The Cycle of Cosmic Catastrophes: How a Stone-Age Comet Changed the Course of World Culture, a trade book by Richard Firestone, Allen West and Simon Warwick-Smith, was published by Inner Traditions – Bear & Company and marketed in the category of Earth Changes. It proposed that a large meteor air burst or impact of one or more comets initiated the Younger Dryas cold period about 12,900 BP calibrated (10,900 14C uncalibrated) years ago.[28]
However, the hypothesis is for an impact to have occurred on the Laurentian ice sheet. So, if it did occur, there wouldn't have been any big global dust clouds anyway ....
In other words, the lack of evidence of global dust clouds does not necessarily preclude the possibility that an impact caused the YD. But it does preclude the possibility of global dust clouds having occurred.
originally posted by: JamesChessman
a reply to: AndyMayhew
Nope. The point is: Why are you seemingly implying that there's a definitive lack of evidence?
I don't believe that you've exhaustively studied the topic and come to that conclusion.
So the Impact Theory was established in 2006, right?
And so your previous statement means that you've been studying this Hypothesis since 2006?
So you've POURED SIXTEEN YEARS, INTO STUDYING this obscure hypothesis. I'm sorry, I can't quite believe you about that.
originally posted by: JamesChessman
But of course, let's be honest, you guys probably aren't... actually convinced of the LACK of evidence of the Impact Theory...
originally posted by: JamesChessman
You also described the Event happening IN A FEW DECADES, right after I quoted information about it happening WITHIN ONE DECADE. Which COULD mean that you're disagreeing with the hypothetical number of decades... OR that you're just not even really reading the conversation, and that you might just be very unfamiliar with the whole topic.
The change was relatively sudden, taking place in decades, and it resulted in a decline of temperatures in Greenland by 4~10 °C (7.2~18 °F),[3] and advances of glaciers and drier conditions over much of the temperate Northern Hemisphere.
AT THE VERY LEAST, I know there is ancient IMPACT DAMAGE in Africa, which is attributed to The Younger Dryas Impact Theory.
^No, you'd need to establish... that definitive lack of evidence, first.
Although the start of the Younger Dryas is regarded to be synchronous across the North Atlantic region, recent research concluded that the start of the Younger Dryas might be time-transgressive even within there. After an examination of laminated varve sequences, Muschitiello and Wohlfarth found that the environmental changes that define the beginning of the Younger Dryas are diachronous in their time of occurrence according to latitude. According to the changes, the Younger Dryas occurred as early as around 12,900~13,100 calibrated years ago along latitude 56–54°N. Further north, they found that the changes occurred at roughly 12,600–12,750 calibrated years ago.[36]
According to the analyses of varved sediments from Lake Suigetsu, Japan, and other paleoenvironmental records from Asia, a substantial delay occurred in the onset and the end of the Younger Dryas between Asia and the North Atlantic. For example, paleoenvironmental analysis of sediment cores from Lake Suigetsu in Japan found the Younger Dryas temperature decline of 2–4 °C between 12,300 and 11,250 varve (calibrated) years BP, instead of about 12,900 calibrated years BP in the North Atlantic region.
In contrast, the abrupt shift in the radiocarbon signal from apparent radiocarbon dates of 11,000 radiocarbon years to radiocarbon dates of 10,700–10,600 radiocarbon years BP in terrestrial macrofossils and tree rings in Europe over a 50-year period occurred at the same time in the varved sediments of Lake Suigetsu. However, this same shift in the radiocarbon signal antedates the start of Younger Dryas at Lake Suigetsu by a few hundred years. Interpretations of data from Chinese also confirm that the Younger Dryas East Asia lags the North Atlantic Younger Dryas cooling by at least 200~300 years. Although the interpretation of the data is more murky and ambiguous, the end of the Younger Dryas and the start of Holocene warming likely were similarly delayed in Japan and in other parts of East Asia.[37]
Similarly, an analysis of a stalagmite growing from a cave in Puerto Princesa Subterranean River National Park, Palawan, the Philippines, found that the onset of the Younger Dryas was also delayed there. Proxy data recorded in the stalagmite indicate that more than 550 calibrated years were needed for Younger Dryas drought conditions to reach their full extent in the region and about 450 calibrated years to return to pre-Younger Dryas levels after it ended.[38]
originally posted by: JamesChessman
And so your previous statement means that you've been studying this Hypothesis since 2006?
So you've POURED SIXTEEN YEARS, INTO STUDYING this obscure hypothesis. I'm sorry, I can't quite believe you about that.
You shouldn't assume you know what other people do/have done with their lives.
AT THE VERY LEAST, I know there is ancient IMPACT DAMAGE in Africa, which is attributed to The Younger Dryas Impact Theory.
So, where is it?
Geologic origin
The origin of desert glass is uncertain. Meteoritic origins have long been considered possible, and recent research links the glass to impact features, such as zircon breakdown, vaporized quartz and meteoritic metals, and to an impact crater.[2][3][4][5][6][7][8] Some geologists[9] associate the glass with radiative melting from meteoric large aerial bursts,making it analogous to trinitite created from sand exposed to the thermal radiation of a nuclear explosion. Libyan Desert glass has been dated as having formed about 29 million years ago.[10] Like obsidian, it was knapped and used to make tools during the Pleistocene.[11]
The glass is nearly pure silica which requires temperatures above 1,600 °C to form – hotter than any igneous rock on Earth.However, few mineral relics survived from whatever caused the melting, including a form of quartz called cristobalite, a rarely occurring high-temperature mineral; and grains of the mineral zircon, although most have reacted to form a higher-temperature mineral called zirconia. Ideas about how the glass formed include melting during meteorite impact, or melting caused by an airburst from an asteroid or other object burning up high in Earth's atmosphere.
So, where is it?
originally posted by: Dalamax
If My memory serves correctly wasn’t there a complex discovered recently (like within the last decade) by a boy on google earth?
He recognised a celestial map theme in the locations of known sites and found a star position that hadn’t been explored. Lo and behold a temple complex was unearthed in South America at the indicated location.
Could the same method be used, possibly using the AE pyramids and the Nile as Milky Way, to offer some locations of interest?
Cool thread btw
a reply to: JamesChessman
Gemstone Found In King Tut's Tomb Formed When A Meteor Collided With Earth
David Bressan: Contributor
May 19, 2019,01:53pm EDT
In 1922, British archaeologist Howard Carter discovered the untouched tomb of Tutankhamen, a minor pharaoh who ruled over Egypt almost 3,300 years ago. When Carter entered the tomb for the very first time and asked if he could see anything, he famously responded: ”Yes, wonderful things.” Tutankhamen's burial chambers were filled with statues made of ivory, items made of gold and precious jewelry. In a treasure chest, Carter discovered a large pectoral, a breastplate decorated with gold, silver, various precious jewels and a strange gemstone, that the pharao wears across his chest. The breastplate shows the god Ra as a winged scarab, made from a yellow-green gemstone, carrying the celestial bark with the Sun and the Moon into the sky.
Carter identified the gemstone at first as chalcedony, a common variety of the mineral quartz. In 1932 the British geographer Patrick Clayton was exploring the Great Sand Sea along the border of modern Egypt and Libya. Here he discovered some strange pieces of glass in the sand. The yellow-green material seemed to be identical to the gemstone found in Tutankhamen's tomb. Two years later he published a short note, suggesting that the pieces of glass were the quartz-rich deposits of a completely dried up lake.In 1998, Italian mineralogist Vincenzo de Michele analyzed the optical properties of the gemstone in King Tut's breastplate andconfirmed that it was indeed a piece of Libyan Desert Silica Glass, as the material is nowadays called. Libyan Desert Glass consists of almost pure silicon-dioxide, like quartz, but its crystal structure is different. It also contains traces of unusual elements, like iron, nickel, chromium, cobalt and iridium. It is among the rarest minerals on Earth, as it is found only in the Great Sand Sea north of the Gilf Kebir Plateau, one of the most remote and desolate areas in the Libyan Desert.
The origin of the desert glass has long remained a mystery. Glass forms naturally when molten rock material cools so rapidly that atoms are unable to arrange themselves into a crystalline structure. Obsidian is a natural glass that forms when lava from a volcano rapidly cools and solidifies. However, no extinct volcano can be found near the site where the desert glass occurs.Tektites are natural glass formed when the debris of a meteorite impact is ejected high into Earth's atmosphere, where the molten debris will rapidly cool and solidify into glass spherules. Tektites have been found across Asia, Australia and as far away as Antarctica. However, no impact crater associated with the desert glass is known in the Libyan Desert. In an alternative scenario proposed in 2013 a comet, composed mostly of ice, entering Earth's atmosphere may have exploded mid-air above the desert. The generated heat burst, an estimated 2,000°C, would be sufficient to melt the upper layers of the sand dunes, forming the desert glass, but without leaving a crater behind.
A new study published in the journal Geology refutes this scenario, claiming that an airburst alone wouldn't be sufficient to explain the formation of the desert glass. The researchers analyzed grains of the mineral zircon found in the desert glass, discovering that the supposed zircon grains are actually a very rare mineral called reidite. Reidite is chemically similar to zircon, however, displays a different, denser crystalline structure. Reidite forms only under very high pressure, es experienced during massive meteorite impacts. Reidite can't form by the low pressure of an airburst. Airbursts, as the researchers argue, create shock waves in Earth's atmosphere with pressures of some thousands of pascals. During a meteorite impact, the shock waves in the ground can reach some billions of pascals, millions of times more powerful than any airburst. Only a meteorite impact on the ground, generating enough pressure to form the reidite and enough heat to melt the sand, can explain the stray field of desert glass fragments found in the Lybian Desert. However, it remains unclear where the impact crater associated with the Lybian Desert Glass is located, even if radiometric dating suggests that the impact happened around 28 to 26 million years ago.
It's also unclear how the desert glass became part of Tutankhamen's treasures. Archaeological evidence suggests that an ancient system of caravan routes existed around the Gilf Kebir Plateau, but it doesn't seem that the routes were used to search or trade for the desert glass. It seems that the piece used for the scarab was discovered by chance or maybe an exotic gift. It remains the only known example where an Egyptian artist used this mysterious material.
-- David Bressan
originally posted by: JamesChessman
First of all, I've already described it pretty specifically, A FEW TIMES already, in this thread. Obviously the impact-damage in the desert of Africa, is exactly that.
I've already described it in more detail too. There are FIELDS OF GLASS FROM MELTED SAND IN THE Sahara Desert, which suggests EXPLOSIVE IMPACT DEBRIS, even if you want to consider it all NATURAL SPACE DEBRIS.
It lines up perfectly with the Younger Dryas Impact Theory, except for the one wildly-different estimation of its creation 29 million yrs ago, instead of 11,000 yrs ago. Which of course, WE ALL KNOW that it's not possible to actually date the age of rock / sand / glass. So it's meaningless to just make up random numbers like that, when the topic is materials that can't be dated.
It's one of the standard ideas of the Younger Dryas Impact Theory, that it landed several huge impacts in the Sahara Desert, as its sand was melted thousands of degrees into glass, from exploding debris impacts.
So I'm absolutely providing the real-life proof of the topic. Which was already common-knowledge for YEARS before this point, so I hardly think I'm supposed to be burdened with PROVING COMMON KNOWLEDGE topics like this, in the first place, but there you go.
I can easily post later about exploded Egyptian pyramids and statues, although now that I posted about the Sahara Desert Glass, it seems a waste of time, that I did so.
I'm mostly getting the sense that there's little-to-no genuine interest in the thread, or else why are people acting like this stuff doesn't exist, or that I need to prove its existence, when this is all COMMON KNOWLEDGE stuff that really doesn't exactly require me to prove it...
So yeah, I think I'm going to focus on delivering pizza IRL, for the moment.
originally posted by: JamesChessman
Also I've become fascinated by King Tut's chest-piece that embedded earlier, just look at this thing!!
It's nearly impossible to imagine how this was actually used in daily life, in ancient Egypt... like, do you think the guy actually wore this everyday, or what?
originally posted by: JamesChessman
It's 3 exhaust pipes, it even has the shape of exhaust pipes, the bell shape is the fire blasting out of it. The bottom of the bell shapes are depictions of clouds rising from the exhaust.