The uranium deposits are obscured by sand, peat and glacialdrift.
铀矿床被砂子，泥炭和冰碛物所覆盖。
2
One of a series of short scars made by glacialDRIFT on a surface of bedrock.
冰川漂流物在基岩表面留下的一系列短痕之一。
3
As geologists mapped glacial deposits in the late nineteenth century, they became aware that there were several layers of drift, the lower ones corresponding to earlier ice ages.