Some 180m years ago, during the early part of the Jurassic period, this site was a lake where mayflies lived and swarmed to mate, as they do today, providing, as a side-effect, a feast for local insectivores.
大约1.8亿年前,在侏罗纪早期,这个地方是一个湖泊,蜉蝣生活在那里,成群交配,就像今天一样,同时也为当地食虫动物提供一场盛宴。