The fact that the ice was still in crystalline form suggested it had been deposited recently, because solar radiation would have degraded it to an amorphous state after roughly 30,000 years.
O feito de que o xeo estivera aínda en forma cristalina suxire que foi depositado recentemente, xa que a radiación solar tería degradado o xeo antigo até levalo a un estado amorfo logo de 30 000 anos aproximadamente.