2002年，休伦湖的潜水员在雷湾国家海洋保护区的沉船事件中游泳。庇护所保护了近100艘船的遗体，这些船只试图穿越“沉船巷”时，它们灭亡了。倾覆的轮船。拖船的遗迹。但是还有其他。在密歇根州海岸约一英里处，中岛附近似乎有一个巨大的污垢。 They soon realized they were looking at an ancient sinkhole, and in the coming years, they would learn there were many others in the Great Lakes.As technology has enabled researchers to get deeper into the sinkholes, scientists have discovered they are time capsules that offer a glimpse into what life was like billions of years ago.Read More: As an Underwater Graveyard, the Great Lakes Have Claimed Close to 10,000 ShipsStudying Underwater SinkholesUnderneath Lake休伦（Huron）是一个古老的盆地，在4亿年前与白云岩，石膏和石灰石形成。随着时间的流逝，这些基岩发生了变化，破裂和形成的腐蚀，从而产生了洞穴。最终，洞穴天花板倒塌并留在凹坑后面。在深度上，污水坑可能是轻度渗透的。这些通常发现靠近岸。光无法像中岛的污水坑那样穿透一些距离海岸的坑洞。“我的描述方式是独一无二的，超凡脱俗的，”国家海洋和大气管理局（NOAA）的研究物理科学家史蒂文·A·鲁贝格（Steven A. Ruberg深入到湖中。这是因为水坑中的水比淡水重，两者之间的相互作用使I