Each storm scours the atmosphere, washing out dust, soot, trace chemicals, and depositing them on the snow pack year after year, millennia after millennia, creating a kind of periodic table of elements that at this point is more than 11,000 feet thick.
每次暴风雪席卷着大气， 冲洗掉灰尘，煤烟， 踪迹化学物， 并将其沉淀于雪层上 年复一年， 成千上万年， 形成了 在这里 超过11000英尺厚的雪层中的这种时代周期表。