中文注释:在加州莫诺湖边,耸立着一座座石塔。由于地下水富含钙,而湖水又富含碳酸盐,于是两者接触便产生出碳酸钙,即石灰石。随着时间的流逝,石灰石沉淀一层层的累积,最后可达30英尺(9米)之高。莫诺湖之所以会出现如此独特的景致,是因为分洪使得湖水水位降低,从而露出了更多的石柱。作者: James P. Blair
莫诺湖 加利福尼亚 图片故事:高清壁纸:英文注释:Mono Lake Tufa, California, 1982Spires of limestone tufa rise from the shores of California's Mono Lake. Tufa form when underwater springs rich in calcium meet lake water rich in carbonates, forming calcium carbonate, or limestone. The limestone precipitates in layers over time and can grow more than 30 feet (9 meters) high. Mono Lake's tufa are particularly dramatic because water diversions have significantly lowered the lake's level, exposing more of the columns. (Photograph shot on assignment for, but not published in, the National Geographic special publication, Our Threatened Inheritance, 1982.) 随机推荐: |
