Global S&T Development Trend Analysis Platform of Resources and Environment
Window to a watery past on Mars | |
admin | |
2017-06-08 | |
发布年 | 2017 |
语种 | 英语 |
国家 | 欧洲 |
领域 | 地球科学 |
正文(英文) | 8 June 2017
This 70 km-wide crater and its surrounds offer a window into the watery past of the Red Planet. The scene, captured by ESA’s Mars Express, is a composite of two images taken in March 2007 and February 2017. It focuses on a large crater in the Margaritifer Terra region in the southern hemisphere of Mars, and includes a portion of Erythraeum Chaos to the north (right in the main colour image below). The region is located at the northern edge of Noachis Terra, which at 3.7–4 billion years old, represents some of the oldest and most heavily cratered terrain on Mars Remnants of valley networks across the scene indicate that water once flowed through this region, shaping the features seen today. Indeed, as shown by the context image, Parana Valles lies to the east, while Loire Valles lies to the northwest. There are a number of distinctive features inside the 70 km crater, such as the striking light-toned material that is interpreted as exposed bedrock. ‘Chaotic terrain’ is visible both inside and outside the crater, marked by randomly oriented blocks separated by troughs. In general, chaotic terrain is associated with the collapse of the surface above regions where large amounts of subsurface water have been released, for example by the sudden melting of ice. As such, outflow channels often begin in chaos terrains.
Chaotic terrain may also mark the sites of ancient lakes, such as in Erythraeum Chaos to the north (right) of the crater in this scene, between Loire and Parana Valles. |
URL | 查看原文 |
来源平台 | European Space Agency |
文献类型 | 新闻 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/108017 |
专题 | 地球科学 |
推荐引用方式 GB/T 7714 | admin. Window to a watery past on Mars. 2017. |
条目包含的文件 | 条目无相关文件。 |
个性服务 |
推荐该条目 |
保存到收藏夹 |
查看访问统计 |
导出为Endnote文件 |
谷歌学术 |
谷歌学术中相似的文章 |
[admin]的文章 |
百度学术 |
百度学术中相似的文章 |
[admin]的文章 |
必应学术 |
必应学术中相似的文章 |
[admin]的文章 |
相关权益政策 |
暂无数据 |
收藏/分享 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论