ファイル:Lewis overthrust fault nh10f.jpg

ページのコンテンツが他言語でサポートされていません。

元のファイル(1,400 × 870 ピクセル、ファイルサイズ: 71キロバイト、MIME タイプ: image/jpeg)

解説

schematic illustration of the Lewis overthrust fault in northern Montana, USA and Southern Alberta, Canada. The fault can be seen best in Glacier National Park, USA and Waterton Lakes National Park, Canada.

original caption: Overthrust Mountains

1 A hypothetical block of the Earth's crust in the region of Glacier National Park as it existed more than 60 million years ago. The two layers shown actually represent many strata of sedimentary rocks.

2 Lateral pressure begins to force the rock layers to buckle.

3 A large fold has been created, forcing the rock strata to double over and overturning some layers. A break, or fault, is forming at the plane of greatest stress.

4 The break has been completed and the strata west of the fault have slid eastward, up and over the rocks east of the fault.

5 The Glacier landscape today. Throughout the millions of years during which the folding, faulting, and overthrusting have been taking place, the process of erosion has continued; a thousand meters of stratified rocks have been worn away, so that only a remnant of the overthrust layers can be seen today. Because Glacier's eastern slope represents the eroded face of the overthrust block, the mountain range rises precipitously from the prairie, with no foothills breaking the abrupt transition from open prairie to mountain valley.
日付
原典 National Park Service http://www.nps.gov/history/history/online_books/natural/10/images/nh10f.jpg - used in the online edition of the book "MANY-STORIED MOUNTAINS - The Life of Glacier National Park" by Greg Beaumont, first published 1978 and online at http://www.nps.gov/history/history/online_books/natural/10/nh10b1.htm
作者 Greg Beaumont, National Park Service
許可
(ファイルの再利用)
Public domain This image or media file contains material based on a work of a National Park Service employee, created as part of that person's official duties. As a work of the U.S. federal government, such work is in the public domain in the United States. See the NPS website and NPS copyright policy for more information.

キャプション

このファイルの内容を1行で記述してください

このファイルに描写されている項目

題材

ファイルの履歴

過去の版のファイルを表示するには、その版の日時をクリックしてください。

日付と時刻サムネイル寸法利用者コメント
現在の版2009年3月9日 (月) 21:582009年3月9日 (月) 21:58時点における版のサムネイル1,400 × 870 (71キロバイト)H-stt{{Information |Description= schematic illustration of the Lewis overthrust fault in northern Montana, USA and Southern Alberta, Canada. The fault can be seen best in Glacier National Park, USA and Waterton Lakes National Park, Canada. original caption: O

このファイルを使用しているページはありません。

グローバルなファイル使用状況

以下に挙げる他のウィキがこの画像を使っています:

メタデータ