Remote Lake May Be Treasure Trove of Climate Data

ScienceNOW Daily News ^ | 13 December 2007 | Phil Berardelli

[Balding_Eagle]

From the project description:

"Earth's climate is changing rapidly, with the global temperature now rising at a rate unprecedented in modern history. These climate changes are being experienced particularly intensively in the Arctic. Arctic average temperature has risen at almost twice the rate as in the rest of the world in the past few decades........."

It looks like a conclusion in search of evidence to me.

[Eccl 10:2]

“Wow! What a cool lake!”

Yeah - perfect for some condos, a golf course, and a marina.

[Candor7]

I doubt that is a crater lake. It looks more like a collapsed cauldera. Crater lakes do not have that kind of wall, which appears to be made of rock which has been eroded on its sides. Craters generally are not made in that way, and the softer material of a crater wall would have been breached by erosion long ago.

[cogitator]

Thanks for the ping. Interesting lake, interesting potential results.

[SunkenCiv]

Thanks neverdem.

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[elephantlips]

That is a very large above-ground pool!

[SunkenCiv]

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[blam]

Coastal lakes and beach sand grain size are used to track ancient hurricanes on the Gulf Coast. Category five hurricanes decreased substancially about 1,100 years ago...why is unknown,so far.

[Sawdring]

If you have Google Earth the crater is located at: 61 Degrees 16’ North 73 degrees 40’ West.

[Hegemony Cricket]

"...the soil is now in Indiana..."

I'll go look in my yard...

[ken21]

kewl!

[RightWhale]

the softer material of a crater wall would have been breached by erosion long ago.

Lots of permafrost around there where it isn't just bedrock.

[Candor7]

Permafrost goes down about 40 feet at the most so it can't me permafrost matrix. Those walls are likely made of solid rock. I still think it looks like an anomalous glaciated collapsed cauldera that is ancient.

If it were a crater, it would be pretty much level with the rest of the terrain. You don't suppose it was impact created with a subsequent volcanic upsurge due to penetration into a magma dome?

Its unusual to see an impact event that would have had to have been at 90 degrees to the surface plane.

If it was soft material as in a crater wall, it would have been glaciated flat, like the rest of the terrain around it.

This is a mysterious formation. I do not believe it is a crater. Its a collapsed cauldera, which has been glaciated. The circumference shows signs of having been rounded on its edges by glaciation, as the ice moved around and over it.It it were soft crater wall material, instead of volcanic rock, it would have been buldozed flatter than a pancake.

I wonder if much geology has been done on the rock matrix surrounding this lake? I doubt it.

[RightWhale]

It is a strange lookng formation. If there were a mile of ice and the asteroid went through that before hitting dry land what would the result look like and what about when the glacier eventually melted and left along with the regolith? It might look like that.

[RightWhale]

it would be pretty much level with the rest of the terrain

The top of the lip is kind of flat. This might have been the level of the ice and stuff above that would have been blown all over the landscape. Also, the impact need not have been vertical: note one side is lifted: the remaining mass of the impactor would be under that side.

[Candor7]

You may be right , but the low side of the formation may also be the up glaciar direction as well. Its a strange thing indeed. Perhaps the impact created a volcanic fusion of material, but that wall looks like it came up fron underneath the formation, like a volcano would.

I wonder if the have done conclusive geology on this?

Its just too regular to be an impact crater, and its too regular in some sense, to be a cauldera either. Very odd.

There are hundreds of impact craters in the Canadian north, in the tundra. They are all flat, without these defined high relief edges,filled with water and organic material, bogs around the edges. Something just doesn't figure here about this formation. If it is indeed an impact crater, it is highly anomalous, and it was not likely created by an ordinary impact like the other hundreds, if not thousands, were in the Canadian North.

Someone should start asking some serious questions about it. If it was an impact crater, there was an explosion "AFTER" the impact object buried itself, with enough extrusive heat and force to create molten rock. Some geologists play with the theory that some impacts can create nuclear chain reactions, if the materials are fortuitously present. Maybe they are right. I can't see this kind of formation ocurring without some major subterranean force being applied from way below. Thats usually volcanic. If its not volcanic, them WTF was it? The walls of this formation likley are as hard as granite.

[Robert A Cook PE]

Seems to me that glaciers would have pushed debris into the lake despite the fact they didnÂ’t scour the bottom.

I agree that the glaciers would seem to have covered the lake as they advanced and retreated, but this is a crater lake (it looks like it is raised above the nearby topography by the crater walls and what’s leftover of the rim) so perhaps the ice wasn’t deep enough here to cover the top of the walls.

The other glacier lakes are scraped out of the flat surrounding rock by the glacier itself, so later glacier advances are going to re-fill the same recess.

[Robert A Cook PE]

This one does kind of jump up and down yelling “I’m a meteorite impact!”, doesn’t it?

The image of a meteor crater jumping up and down the middle of north Canada is NOT what I want to think about ...

Now, how did you guys manage to lose the friggin' North Magnetic pole? It's getting shipped to Siberia right now, and I want it back!

[JBGUSA]

fhayek wrote: I bet that it shows that Earth’s climate has warmed, and cooled thousands of times over the last million years. With man, without man, with dinosaurs, without dinosaurs, with unicorns, without unicorns. One thing that does not happen is that the earth does not change.

neverdem wrote: The second link is a pdf link. This impact crater's sediment study may turn out to be very interesting, IMHO.

Bush caused it all.

Any results yet?

[RightWhale]

Another possibility is the most gigantic pingo ever.