To collapse a range of approximately 70 million years, when the crust has a swamp which is a collection of various Lam 18 caused a large lake, it's called "kwan.
The collapse of boundaries occurred about 70 million years ago in a swampy creek in which a collection of 18 lines, resulting in a big pond, so-called "lake.
Caused by a slump of crust about 70 million years ago. A basin of water, which is a collection of various lines, causing a 18 Creek Lake. So called "Kwan