|
发表于 2007-4-10 14:04:50
|
显示全部楼层
20070410
Yellowstone National Park, Wyoming, 1984
Photograph by James L. Amos
A shimmering travertine deposit forms a limestone terrace around a mineral spring at Mammoth Hot Springs in Yellowstone National Park.
This formation, called Minerva Terrace, formed as mineral-laden water bubbled over and evaporated, leaving a sparkling white calcium-carbonate crust. These deposits, which can accumulate at up to a foot (30 centimeters) per year, create a spectacular and constantly changing landscape.
(Photo shot on assignment for, but not published in, “The Planets: Between Fire and Ice,” January 1985, National Geographic magazine)
黄石国家公园,怀俄明州,1984
黄石国家公园的Mammoth温泉中,闪闪发光的钙华深积物环绕着矿物泉形成了一个石灰岩平台。这种被称为Minerva Terrace的地层结构是这样形成的:矿物泉涌出并蒸发后,留下闪闪发光的白色碳酸钙外壳。这种沉积物每年可以生长30厘米,创造了一种壮观而多变的地貌。
[ 本帖最后由 sock 于 2007-5-29 17:41 编辑 ] |
本帖子中包含更多资源
您需要 登录 才可以下载或查看,没有账号?立即注册
×
|