Posted on 03/09/2005 10:19:19 AM PST by ZGuy
It's a mystery that has puzzled scientists for years but researchers said Wednesday they have discovered why there isn't much melted rock at the famous Meteor Crater in northern Arizona.
An iron meteorite traveling up to 12 miles per second was thought to have blasted out the huge hole measuring three-quarters of a mile across in the desert.
The impact of an object at that speed should have left large volumes of melted rock at the site. But British and American scientists said the reason it didn't was because the meteorite was traveling slower than previously estimated.
"We conclude that the fragmented iron projectile probably struck the surface at a velocity of about 12 km (7.5 miles) (per second)," said Professor H. Jay Melosh, of the University of Arizona, in a report in the science journal Nature.
Meteor Crater, which was formed about 50,000 years ago, was the first terrestrial crater identified as a meteorite impact scar.
Melosh and Gareth Collins, of Imperial College London, used a simple model to calculate the speed on impact. They showed the meteorite had slowed when it hit the Earth's atmosphere and broke into fragments before it struck the Earth.
They calculated the impact velocity was about 26,800 miles per hour.
"Even though iron is very strong, the meteorite had probably been cracked from collisions in space," Melosh said in a statement.
"The weakened pieces began to come apart and shower down from about 8.5 miles high. As they came apart, atmospheric drag slowed them down, increasing the forces that crushed them so that they crumbled and slowed more," he added.
The scientists said that at about 3 miles altitude, most of the meteorite was spread in a large cloud.
The crater appears to be square with rounded corners. Maybe octagonal. Not particularly round.
too much of and amazing coincedence that the metoer landed right at the end of the road. i find that suspicious. thing had to be steered in to land that precisely.
Looks like it came in over the Pole, the higher
debris part of the crater is to the south.
LOL! My apologies for being cold and heartless.
That would be a scene wouldn't it. They'd all be little flat smoking pancakes. Of course, all they would have to do is blow on their thumbs and pop! all would be right again.
Sounds like you are a fan of the old cartoons. My preference are the looney tunes.
I always thought it was this guy:
Dan
Wonderful.
Now call me when they figure out what happened to Judge Crater.
Whoa.
Think of the SIZE of that bad boy!
Dan
SPOTREP
"Strategerist...Since Jun 6, 2004"
Yer implying that a 3.5-year FReeper is a troll and you ain't been here a year?!
MUD
I have had that same view a few times. Pretty impressive for a hole in the ground. ;~))
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Archaeology/Anthropology/Ancient Cultures/Artifacts/Antiquities, etc.
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And his father bombed Pearl Harbor.
I've often wondered how many humans were killed in this impact?
The kiddos were more impressed with the crater gift shop than the crater buttt I don't think they will ever forget the crater. We went there because my husband went as a kid and was impressed.
Another solution to the problem -- one that is more plausible -- is that arrived at by Eugene Shoemaker in the 1950s ("FG'sS", as if I need to add it); another possibility is that the straw man underlying the supposed problem is solved by not assuming there was iron involved in the first place.
LOL! I would have had a heart attack on the spot!
"It's a lot more believable than that God miscommunicated."
God does not err, but people do.
We get things wrong. God says, "Fornication is a sin," and we hear, "Unless you're engaged. Or unless you're really in love. Or unless the other person is really, really hot."
When we start educating our children, we don't start with advanced subjects. We start with what they can understand at their stage of development, and continue from there.
You have to think God does the same. How are you going to explain "billions of years" to people who can't count past a thousand? Even if you tried, when they repeated it back, it would be garbled.
If I may suggest, download "Mere Christianity" by C.S. Lewis, and search for the word "mirror." See his discussion on our perceptions of God.
Some things in the Bible are allegorical. When Jesus said, "I am the good shepherd," He didn't mean that He actually kept sheep and was skilled at ovine husbandry.
The theological truth contained in Genesis is that God created everything in the universe. The people who wrote Genesis explained it as best they could, but their horizons were limited. To insist on six-day creation in the face of overwhelming evidence that God did things differently is really pretty silly.
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