I have posted extensively on the topic of the events that took place around 11,000 to 13,000 years ago. A lot of evidence supports the idea of a crustal shift triggered by a comet impact into the ice cap close by the then North Pole position. Some of it is direct but a huge amount of the evidence is indirect or inferential.
Most telling is that a direct crustal shift does end the million year Ice Age while nothing else does. In addition the ice is exactly were it belongs and the geological evidence is then in the right place geographically.
All the good direct evidence is long since lost under three hundred feet of water.
This article discusses the collapse of
. The assumption is that the collapse triggered a cooling spell which is quite reasonable. It would have taken centuries for ocean temperatures to normalize. Lake Agassiz
It also seems reasonable for the crustal shift to create the necessary conditions for the creation of the lake itself. That may not be true at all. The land barrier would become much more secure if the lake formed thirty degrees north over many millennia. The crustal shift would then lift up the lake itself sufficiently to effect the broad swift emptying that in fact took place.
It may actually solve a problem. You will observe that there are no large lakes positioned on the ice caps anywhere today. It is not unreasonable at all to presume that they are simply impossible because natural elasticity and failure modes assure us such water will penetrate the ice and escape.
was bounded by land and perhaps even at sea level while trapped against the polar ice cap. The move south lifted this water hundreds of feet higher and possibly even forced large amounts of the water to be pushed out by collapsing ice. Lake Agassiz
It is also possible that the original conditions for
were set up by a prior shift in the crust and this final shift merely emptied the lake. The possibility of an earlier shift is creditable because the last shift was clearly engineered and that would not be possible unless the engineers had first hand confirmation of the possibility. Lake Agassiz
We are still a long ways from working out time lines with any particular confidence of say even a century or so. It really needs a round table with specialists.
Europe's last big freeze... and global warming could plunge us into the cold again, warn scientists
Last updated at 2:00 AM on 02nd April 2010
Mark Bateman from the University of Sheffield, said a catastrophic flood was caused when an ice sheet in the U.S melted causing a huge amount of freshwater to be dumped into the
This led to the shutting down of the Gulf Stream ocean circulation pattern that brings warmth to
A huge lake (pictured), the size of the
UK, dumped fresh water into the Arctic Ocean around 13,000 years ago
'We're talking about a lake the size of the
emptying very quickly,' Dr Bateman said. UK
'We don't know the exact period of time but we're talking about a catastrophic flood.'
The finding has confirmed past theories about the likely cause of a sudden cooling period called the Younger Dryas when temperatures in
Europe, similar to today, quickly returned to ice age conditions. The cooling lasted for about 1,400 years.
'Our research shows that if you put a large volume of fresh water into the
North Atlantic in a very short space of time, this is what happens,' Dr Bateman said.
His team's work is published in the latest issue of the journal Nature.
The Gulf Stream acts like a conveyer belt by bringing warm water from the tropics to
Europe while cold salty water sinks to the depths in the far north. This 'overturning' circulation draws in yet more warm water from the south.
The last of winter sea ice in
Liverpool Bay and exposed cliff sediment at the MacKenzie Delta in Arctic . Scientists fear global warming could cause another massive flood leading to a big freeze Canada
Climate scientists fear rapid global warming could trigger a sharp increase in the amount of meltwater from
This surge in freshwater could trigger a tipping point that overwhelms the Gulf Stream, shutting it down and likely plunging Europe into another deep freeze.
Dr Bateman and his team confirmed the path of the floodwaters from
Lake Agassiz that covered part of what is now Canada and the northern . The lake had formed in front of the ice-sheet that once covered a large part of United States North America.
Scientists had previously guessed that a giant flood unleashed from the lake probably caused the Younger Dryas cooling but couldn't confirm the route of the floodwaters.
A research team log sediments in a cliff exposure at
Liverpool Bay, Northwest Territory, Arctic . They said a massive flood caused the Canada Gulf Stream to shut down 13,000 years ago.
Dr Bateman found that the waters flowed down the Mackenzie River,
Canada's longest, rather than the Saint Lawrence Seaway that had previously seemed the most likely route.
Studying sediments from cliff sections along the river delta, he said the evidence spanned a large area at many altitudes. This could only be explained by a mega-flood from
. Lake Agassiz
Dating of the sediments helped the team pin down the date of the flooding, showing that it occurred right at the start of the Younger Dryas.
Satellite observations and computer models by scientists have shown that the Greenland ice sheet is melting at an accelerating rate, dumping large amounts of ice and meltwater into the
A study published in the journal Science last November said recent summers further accelerated
Greenland's mass loss to the equivalent of 273 cubic kilometers of water per year in the period 2006-2008.