It was chosen over 11 other sites because the yearly effects of human activity on the earth's soil, atmosphere and biology are clearly shown in its layers of sediment.

（科学家）之所以选择它而不是其他11个地点，是因为人类活动对地球土壤、大气和生物的年度影响在它的沉淀物层中得到了清楚的展现。