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File:Ophir Chasma.jpg

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原始檔案(2,438 × 2,569 像素,檔案大小:778 KB,MIME 類型:image/jpeg


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描述
English: This synthetic oblique view shows Ophir Chasma, the northern most one of the connected valleys of Valles Marineris. For scale, the large impact crater in the right corner is about 30 km wide. Ophir Chasma is a large west-northwest-trending trough about 100 km wide. The Chasma is bordered by high-walled cliffs, most likely faults, that show spur-and-gully morphology and smooth sections. The walls have been dissected by landslides forming re-entrants. The volume of the landslide debris is more than 1,000 times greater than that from the May 18, 1980, debris avalanche from Mount St. Helens. The longitudinal grooves seen in the foreground are thought to be due to differential shear and lateral spreading at high velocities.
日期
來源 NASA Image of the Day
作者 NASA/JPL/USGS

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Public domain 本作品由NASA創作,屬於公有領域。根據NASA的版權政策:“NASA的創作除非另有聲明否則不受版權保護。”(參見:Template:PD-USGov/zhNASA版權政策JPL圖像使用政策
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目前2011年8月22日 (一) 18:54於 2011年8月22日 (一) 18:54 版本的縮圖2,438 × 2,569(778 KB)Originalwana{{Information |Description ={{en|1=This synthetic oblique view shows Ophir Chasma, the northern most one of the connected valleys of Valles Marineris. For scale, the large impact crater in lower right corner is about 30 km wide. Ophir Chasma is a larg

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