Antarctic Craters Reveal Strike

BBC ^ | 8-23-2004

[blam]

Antarctic craters reveal strike

The asteroid may have raised sea levels by up to 60cm

Scientists have mapped enormous impact craters hidden under the Antarctic ice sheet using satellite technology. The craters may have either come from an asteroid between 5 and 11km across that broke up in the atmosphere, a swarm of comets or comet fragments.

The space impacts created multiple craters over an area of 2,092km (1,300 miles) by 3,862km (2,400 miles).

The scientists told a conference this week that the impacts occurred roughly 780,000 years ago during an ice age.

When the impacts hit, they would have melted through the ice and through the crust below.

Professor Frans van der Hoeven, from Delft University in the Netherlands, told the International Geographical Union Congress in Glasgow that the biggest single strike seared a hole in the ice sheet roughly 322km (200 miles) by 322km.

Impact melt

This would have melted about 1% of the ice sheet, raising water levels worldwide by 60cm (2ft).

The research suggests that an asteroid the size of the one blamed for killing off the dinosaurs 65 million years ago could have struck Earth relatively recently.

Early humans would have been living in Africa and other parts of the Old World at the time of the strikes.

But the impacts would have occurred during an ice age, so even tidal waves would have been weakened by the stabilising effect of icebergs on the ocean.

The craters were resolved using satellite data to map gravity anomalies under the ice sheet.

[John O]

Since we're told creation was six, literal, 24-hour days by God in His word

I'm sorry HLW but the bible does not state that the days were 24 hours long. It says the evening and the morning were the first day etc. While this does tie us to a recurring period it does not tie down what that period was.

[John O]

The word used for DAY (yom) only ever means a literal 24 hour period

From Strongs concordance:

"03117 Mwy yowm yome" (sorry I don't have the hebrew fonts, The first should be in Hebrew, the second is the English equivalent and the third is the pronounciation)

from an unused root meaning to be hot; TWOT-852; n m

AV-day 2008, time 64, chronicles + 01697 37, daily 44, ever 18, year 14, continually 10, when 10, as 10, while 8, full 8 always 4, whole 4, alway 4, misc 44; 2287

1) day, time, year
1a) day (as opposed to night)
1b) day (24 hour period)
1b1) as defined by evening and morning in Genesis 1
1b2) as a division of time
1b2a) a working day, a day’s journey
1c) days, lifetime (pl.)
1d) time, period (general)
1e) year
1f) temporal references
1f1) today
1f2) yesterday
1f3) tomorrow"

It looks to be a very general time word.

I leave it as an exercise for the interested reader to find examples of each usage.

[John O]

What about the time for the Sun to orbit the center of the galaxy? How long does that take?

(While I'm a creationist (intelligent design version) I know that we have to look at the word from God's viewpoint so it's posisble He may have used the galactic day as a measure)

[jpsb]

Don't leave in in supense! Is he right and if so what does it mean?

[null and void]

Now sure about the dry vrs wet, a mile thick ice cap sounds kinda wet.

Ah, but a mile thick ice sheet doesn't continue to pour into the crater until all the heat is absorbed converting it to steam.

A wall of ice surrounding a red hot crater is much more benign than a wall of ocean encroaching on a 60 mile wide geyser of live steam.

With liquid water, the heat is fairly quickly transported to the atmosphere as steam, water vapor, salts, and sea bottom ooze swept into the mix.

Ice OTOH doesn't transport the energy planet wide, the crater ends up radiating most of the heat out to space, limiting the damage to the local vicinity.

[SunkenCiv]

Yeah, he's right, but it doesn't mean that iceballs from space hit the ground every day. :')

[jpsb]

sounds reasonable, but alot of the ice would melt(fast) and pour in (but not like ocean water). One other thing, this cater is 200D miles and the gulf crater 60D, seems like a lot more energy (but can't say for sure without knowing density).

The major difference I can see is one hit near (relatively) the equator (better mixing) and the other at a pole, I would guess that if major impact caused extinctions this impact should have caused at least an extinction in the southern hemisphere.

[null and void]

One other detail. In both cases the top one mile of target was blasted into ballistic trajectories.

In the Chicxulub case this was rock, which was heated to incandescence by the impact and subsequent reentry into the earth's atmosphere. As vast numbers of white hot rocks passed overhead it was like turning the atmosphere into a broiler element. Animals were scorched and vegetation withered. Wherever the rocks fell they started fires. Vast areas were burned in an instant.

In the antarctic case it was ice, flashed to steam and lost to space. The effects were mercifully limited to the immediate area.

Good thing, since the antarctic impact was ~4X larger. (~200 mile Ø, vs Chicxulub's ~120 mile Ø).

[SunkenCiv]

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To all -- please ping me to other topics which are appropriate for the GGG list. Thanks.

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[SunkenCiv]

Giant asteroid rocked Antarctica
Near Earth Object Information Centre | 8/20/2004 | staff
Posted on 10/17/2004 9:26:51 PM PDT by SunkenCiv
http://www.freerepublic.com/focus/f-bloggers/1248406/posts

Cosmic Hole-in-One Captured Over Antarctica
RedNova | Monday, 5 September 2005, 20:43 CDT | staff / press release
Posted on 09/05/2005 9:36:19 PM PDT by SunkenCiv
http://www.freerepublic.com/focus/f-chat/1478231/posts

http://www.freerepublic.com/focus/f-news/1491615/posts?page=11#11

http://www.freerepublic.com/focus/keyword?k=asteroid

[balch3]

Blah blah blah blah blah...

Since the earth is only about 10,000 years old, I love these liberal dating methods claimed as "fact"

---

Ditto!

[SunkenCiv]

GGG managers are SunkenCiv, StayAt HomeMother & Ernest_at_the_Beach	join list or digest view topics view or post blog bookmark post a topic subscribe
Blast from the Past. Just updating the GGG information, not sending a general distribution. To all -- please ping me to other topics which are appropriate for the GGG list.

[csmusaret]

In a defense of indigenous Mexican people, President Obama blamed the Mayans failed doomsday prediction on G.W. Bush.

[fanfan]

Bah, you're all just figments of my imagination and I'm just a brain in a jar.

Is the jar labeled Aby-normal?
Shameless Young Frankenstein reference/

[Darksheare]

Brain in a jar?
Wouldn’t happen to be due to the Fungi of Yuggoth?
And has anyone seen any Mountains of Madness down there?