翻訳と辞書 |
Little Sahara Recreation Area : ウィキペディア英語版 | Little Sahara Recreation Area
The Little Sahara Recreation Area in Utah is a large area of sand dunes, hills and sagebrush flats located in the west central part of the state approximately north of Delta, Utah. It is managed by the U.S. Department of the Interior Bureau of Land Management. A portion of the northwest corner of the facility has been designated as The Rockwell Natural Area and is off limits to vehicles to preserve and shelter desert plants and animals. == Geology == The Little Sahara sand dunes are remnants of a large river delta formed by the Sevier River from about 12,500 to 20,000 years ago. The river emptied into ancient Lake Bonneville near the present day mouth of Leamington Canyon. After Lake Bonneville receded, winds transported the sand from the river delta to the current location. The dunes are still moving 5 to 9 feet (1.5 to 3 m) per year. The sand consists of quartz grains, with minor amounts of feldspar, biotite, calcite, garnet and magnetite.
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Little Sahara Recreation Area」の詳細全文を読む
スポンサード リンク
翻訳と辞書 : 翻訳のためのインターネットリソース |
Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.
|
|