Hi V,
Just some facts that I've been able to dig up.
Re: The Vrederfort crater:
The meteorite, larger than Table Mountain, caused a thousand-megaton blast of energy. The impact would have vaporised about 70 cubic kilometres of rock - and may have increased the earth's oxygen levels to a degree that made the development of multicellular life possible.
Notice that this author thinks the strike actually may have made life possible. Go figure, huh?
Mt St Helen:
Energy release: 24 megatons thermal energy
Technically speaking the 'supposed', remember no one was actually at the asteroid strike to really measure the energy released, difference would be about x40. Not really 10 millions as you propose.
Keep in mind also that the energy release would be different. In the asteroid strike the brunt of the energy would flow into the reasonably solid earth and a great amount of that energy would be disapated as it traveled through the core of the earth. In other words compacting soil and rock as the waves of energy were absorbed into the body of the earth. The Mt. St. Helen's energy, on the other hand is directed into the atmosphere. The top of the mountain, it is measured to be about 3.7 million cubic yards of earth, was blown into the atmosphere by the energy release in an 'outward' direction. This basic energy traveling in the complete opposite direction is believed to have blown some 1.4 billion cubic yards of ash as high as 80,000 feet in a matter of minutes.
When one understands the various affects of the dissapation of energy based on the direction in which that energy is traveling, then the amount of debris released into the atmosphere by the different events can be substantially different.
My suggestion to all who want to believe what well qualified scientists would attempt to teach us about the creation and even such things as the age and evidences found about the earth that are in contradiction to the basic teaching of the Scriptures, begin at the beginning and ask a lot of, 'well, how did you prove that?' and follow that up with, 'ok, and how did you prove that?'
There is a rather humorous story about the encyclopdia britannica that is well documented. It seems that many years ago, I'm sure it's been corrected by now, when one looked up fossils and their ages, it was explained that their age was determined by the rock strata in which they were found. Then when one went to look up rocks and their ages, it was explained that they were dated by the fossils which were found in the layers from which the rocks came. So, the fossils dated the rocks and the rocks dated the fossils. Funny, huh?
Now, yes, I fully understand that we like to think of ourselves as more competent than that today, but it has already been proven repeatedly that most of our dating methods are based on some 'assumed' givens. For example: carbon dating is based on the beginning foundational assumption that carbon levels have remained stable, but there is no real proof of this. Just as it's really just as possible that the iridium content that first began this leg of our discussion may well have been a result of the 'miracle' of the creation event we don't know that the carbon content of material wasn't different at the creation event that would give us bad dating. Now, especially with carbon dating, good, honest scientists have taken the exact same samples from one lab to another as a blind test and received quite a varying range of ages. One author that I read claimed that there seemed to be a slight oddity that carbon dating becomes very unstable beyond 5,000 years. Huh? Why might that be? Maybe because it's all just anybody's guess beyond 6,000 years.
Look, each of you are going to believe what you will believe and some are more easy to accept 'facts' thrown at them, than others. I have found in every piece of evidence that is 'dated', there are a lot of unanswered questions about the foundation of those dating methods. Every single one is based on some foundation of a 'constant' that really can't be assured other than to 'assume' that everything has always been as it always is. As I understand the 'creation' event, just as with the light being visible to the naked eye across the entire universe in an instant, I'm convicted by the Spirit in my spirit that things aren't really as they appear to be.
Now, you are free to say, 'well, that makes God a liar,' and quite frankly how you can justify such a statement that really just explains our inability to understand the things and ways of God, oh, that's in the Scriptures isn't it? Or for you to say that 'well, men today are much wiser than those ancient fools of old,' although God's word also says that He will make foolish the wisdom of the wise, I guess some might construe that to mean that God is going to make men believe lies.
God bless you all.
In Christ, Ted