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The one thing that stands out from all of the evidence is the importance of very large comets that enter the Solar System and break apart, leaving streams of debris that interact with our planet for millennia after the parent body or bodies have been captured and torn apart by intra-solar system forces. That such bombardments of the earth have occurred at other times is becoming more widely known, witness the work of Richard Firestone, Alan West and Simon Warwick-Smith who have identified the Carolina Bays as "air impact" craters from overhead cometary explosions exactly like that of Tunguska. In fact, similar "craters" were found in the Tunguska region with the exact same morphology. This even has been dated to about 12,500 years ago and was global in extent and cataclysmic in effect. Life on Earth almost came to an end. What is frightening about this even is the sheer numbers of craters - upwards of 50,000 of them.
This curious report is written in the chronicles of the medieval monk known as Gervase of Canterbury. The year of the event was AD 1178 and the date, 18 June on the Julian calendar, converts to the evening of 25 June on the modern Gregorian one. If real, it is clear that some extraordinary event on the Moon is being described and the meteorite expert Hartung proposed that what was observed and recorded 800 years ago was the impact of a body on the Moon. The flame, he suggested, was the writhing of incandescent gases, or sunlight reflection from dust thrown out of the crater. The blackish appearance of the Moon along its whole length was a temporary suspension of dust buoyed up by a transient atmosphere.
Hartung deduced that if there was a crater, it would be at least 7 miles in diameter, possess bright rays extending from it for at least seventy miles, and would lie between 30 and 60 degrees north, 75 and 105 degrees east on the Moon. ...
As it happens, there is one crater with the predicted characteristics exists, a crater named after the seventeenth-century heretic Giordano Bruno. This crater is located at 36 degrees N and 105 degrees E, within the predicted area. It is 13 miles in diameter and is distinguished by its remarkable brightness, and by the brilliant system of rays which extend several hundred miles out from it.
A comet/asteroid impact on a large glacier mass could cause the following effects:
Release vast quantities of heat.
Produce massive earthquakes.
Produce trapped superheated steam that would exert force to uplift and move a large glacier mass.
Fracture glacial sheets.
Eject water, steam and ice high into the atmosphere.
Release stored potential energy.
Produce a partial glacial ice melt.
Produce an almost immediate rise in sea level.
Produce great rainfall.
Slowly driving the ocean crust deeper.
Slowly raising the continental crust higher.
Produce volcanoes and lava flows.
The impact of a large comet/asteroid (~2 mile diameter) with an Ice Age glacial sheet could produce the following chain of events:
The impactor penetrates through miles of thick ice, like a bullet. Below the surface, the impact releases the energy of a million nuclear bombs. A gas bubble of trapped superheated steam forms. The steam causes a general uplifting of the glacier ice sheet. The ice sheet rises like a steam boiler about to burst. The gas bubble exerts tremendous force on the ice flow. The impact triggers the release of potential energy locked in ice flow allowing million of tons to break loose and begins to move on the frictionless fluid bed toward the oceans. Some of the steam escapes like an erupting geyser or volcano. The glacier sheet fractures, opening up fissions for the steam to escape. Boiling water and steam further lubricate the surface boundary layer of the ice flow. The explosion hurls large masses of ice fragments into the air with great force. Ice and water flowing off the continents cause an immediate rise in sea level in conformance with the Displacement Theory. The released superhea ted steam falls back to Earth, generating very violent storms. Heavy rain falls for several days and weeks. The atmosphere heats up.
Large earthquakes combined with the Earth’s crustal rebound from the movement of large ice sheets exert significant strain on the tectonic plates. The strain is relieved by the eruption of volcanoes, and lava flows throughout the world. Underwater earthquakes expose frozen methane hydrate beds. The heat generated at the impact point and the heat from underwater volcanoes and lava flows elevate the temperature of the ocean bottoms and melt the exposed methane hydrate. The released methane bubbles to the surface, where in time it is ignited by lightning strikes, which further raises atmospheric temperatures. The methane burn releases large quantities of carbon dioxide into the atmosphere. In the end, the global temperature rises significantly, breaking the back of the Ice Age.
"Research team says extraterrestrial impact to blame for Ice Age extinctions"
"Bunch and Jim Wittke, a geologic materials analyst at NAU, are co-authors of the paper, which fingers an extraterrestrial impact 12,900 years ago for the mass extinctions at the end of the Ice Age. "
"We believe this is the strongest evidence yet indicating a comet impact in that time period," says Tankersley.
The end came suddenly. A large comet or asteroid cut its way down to the Earth in a flash and bore through the glacier sheet. For most people, this initial event was so sudden and distant that it might go unnoticed. They would first feel the effects of the impact when a series of massive earthquakes would rumble through a few minutes later. The cities of brick and stone would crumble about them and on top of them. If they looked at the sky, they might notice that it was beginning to take on strange colors before it finally went completely dark.
Survivors would stumble around, trying to free family and friends trapped in the rubble. The sea level would begin to rise at the same time that torrents of rain would begin to fall from the sky. As the hours turned into days and months, the unending deluge would lift the level of the sea by as much as 400 feet, submerging approximately 15 million square miles of coastal land around the world and drowning its inhabitants. This brought to an end the Ice Age and destroyed most traces of the Ice Age civilization that came before us.
While I think we're all talking about a limited regional release of fresh water from a distinct melting of portions of the North American ice sheet.
Hans, always a pleasure to debate with you. Well, it would be more of a pleasure if you actually read the links and the OP's posts, but still good to see ya.
I used that because the jumping off point for this was the first theory published, that I found, about the ramifications of a comet hitting the Ice Cap in 11k b.c. and causing sudden cataclysm was titled:
"Theory Supporting the Biblical Account of the Great Flood" I'm personally not a fan of it, as it sounds like he is pursuing religious goals. But if you read the paper you will see that is not the case.
No, we are not all talking about "melting of portions of the North American ice sheet". As I said last night on the Cuban thread, READ THE POSTS you were not present for yesterday with more than a cursory glance. The debate evolved and we found new information that leads to this thread.
If you read the second post I made, which is a recap of what I already posted yesterday, you would be able to ascertain what it is we are discussing.
I am intersted to hear your thoughts, because I think this is the thread where you are ging to show how reasonable you are to new information and willing to concede that someone else may have a point.
Hans: I did, your point in guessing at this and being wrong is what exactly?
Hans: What that a meteorite or Comet hit the north American ice cap? Pretty much accepted.
What caused the extinction of mammoths and the decline of Stone Age people about 13,000 years ago remains hotly debated. Overhunting by Paleoindians, climate change and disease lead the list of probable causes. But an idea once considered a little out there is now hitting closer to home.
Between 17,000 years ago and 7000 years ago, at the end of the last Ice Age, terrible things happened to the world our ancestors lived in. Great ice caps over northern Europe and north America melted down, huge floods ripped across the earth, sea-level rose by more than 100 metres, and about 25 million square kilometres of formerly habitable lands were swallowed up by the waves.
Really? Because in September 2007 physorg.com, when reporting the first evidence of a comets strike in Canada ushering the Ice Age, they described the as such:
" Hans says: Look up the cycle of Cosmic Catastrophes by Firestone, west and Warwick-smith. Which they published in 2006. This concept has been around for awhile."
This is also by Firestone and is dated September 2005
Hans says: People have been looking at this since the late 1990's as far as I remember.
Hans says: One other point, misrepresenting what I said.
I stated in response to your charge I hadn't read the materials
"I did, your point in guessing at this and being wrong is what exactly?"
You then go on about something completely different.
MORE TO THE POINT That would be THREE YEARS AFTER Marusek's theory I am citing; the reason I LEAD WITH IT, and give him so much credence is because he is foremost in his field, AND THE FIRST TO POSIT the result, in geological terms of theorizing tends to hold more weight. Does your book say something different about the topic at hand?