Un gruppo di scienziati del Laboratorio Nazionale Pacific Northwest negli USA, ha scoperto un modo di realizzare in pochi giorni quello che presumibilmente richiede alla natura milioni di anni: convertire il legno in minerale formando legno pietrificato. La pietrificazione รจ un processo di mineralizzazione detto sostituzione, processo associato al legno che, molecola dopo molecola, viene sostituito da silice. Le foreste furono sepolte dalle ceneri delle eruzioni vulcaniche e la loro ‘sepoltura’ (senza ossigeno) ha impedito la completa decomposizione del legno.
Successivamente, l’acqua del terreno ha iniziato a circolare nella cenere, ha prelevato da essa la silice e l’ha trasportata in the trunks. Here the silica was deposited slowly replacing the wood piece by piece. Replacement is so small that the cell structure of wood is preserved
and you can even recognize the growth rings, bark and similar features, a process that seems to happen in a million years.
Yet Yongsoon Shin and colleagues at Pacific Northwest National Laboratory
have replicated the process in less than a week. They put a cubic centimeter of wood in an acid bath for two days, I have soaked in a solution of silica
for another two days, they did it air dry, placed in a furnace filled with argon gradually increasing the temperature to 1,400 ° C, cooked for two hours and then they did it to cool in argon to room temperature. The wood was petrified instantly, silica has assumed a permanent resistance to carbon remained in the cellulose to form a new silicon carbide ceramic. The material in identical replica of the wooden architecture.
This idea would agree with the assumptions on developments relating to the geological age marked by slow sediment deposits through a uniform past during which there were no cataclysmic changes for long arcs of time, but there is evidence that the petrification does not require long periods. Hot water rich in dissolved minerals such as silica, similar to that found in some springs of Yellowstone, has petrified a block of wood in one year and now we see that the process can be realized in the laboratory in less time. Considering all the natural factors that have occurred over thousands of years as volcanoes, erosion, changes in pressure and temperature, and if we believe in the Bible, the great flood occurred about 4,300 years ago and raising the tectonic must be accompanied, it is really so substantial that the petrified wood could have been formed naturally over a period of time less than millions of years?
The petrification of the wood may have required millions of years, but we do not have reliable data on the subject. According to many creationists, the Bible indicates that the earth goes back only six thousand years ago, but this does not correspond to what the Scriptures
. Genesis 1 describes a period of renewal and rebuilding
the earth's surface destroyed in a disaster year. The reconstruction and the creation of man took place about 6,000 years ago but the land itself can be considered
older. It 'always good to evaluate carefully the statement of the scientific community, especially when it is in contradiction with the Bible. The error could be due to a difficult
interpretation of the Bible, or from a misunderstanding of the scientists. BN
The Good News: September-December 2006
https: / / www.labuonanotizia.org:4430/
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