着重对最近几年国内地质样品分析的一些新方法加以介绍。
Some new methods for geological sample analysis in recent years are stressed.
伯克利地质年代中心的保罗·雷恩和比尔·哈特在迈阿密大学的实验室分析了在赫托村发现的这些样品，鉴定结果显示头骨距今约为16万年前至15.4万年前之间。
The Herto samples were analyzed by Paul Renne of the Berkeley Geochronology Center and in Bill Hart's lab at Miami University. The results gave an age of 160, 000 to 154, 000 years for the skull.
沉积物内含有孢粉化石，而每一粒孢粉都含有能告诉我们答案的碳原子标记，容许我们按照地质时间的顺序分析样品。
The sediments contained fossil pollen. Each grain had a telltale carbon atom signature, allowing them to put the samples in chronological order.
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