The Full Wiki

Eberswalde (crater): Wikis

Advertisements
  
  

Note: Many of our articles have direct quotes from sources you can cite, within the Wikipedia article! This article doesn't yet, but we're working on it! See more info or our list of citable articles.

Did you know ...


More interesting facts on Eberswalde (crater)

Include this on your site/blog:

Encyclopedia

From Wikipedia, the free encyclopedia

The Martian crater Eberswalde
Eberswalde cntx 100.jpg
Coordinates 24°S 33°W / 24°S 33°W / -24; -33Coordinates: 24°S 33°W / 24°S 33°W / -24; -33
Diameter 65.3 km
Depth approx 800 m
Discoverer Michael C. Malin and Ken Edgett
Eponym Eberswalde, Brandenburg, Germany

Eberswalde, formerly known as Holden NE, is a partially buried impact crater in Margaritifer Terra, Mars. Ebserswalde Crater lies just to the north of Holden Crater, a large crater that may have been a lake. The 65.3-km-diameter crater, centered at 24°S, 33°W, is named after the German town of the same name, in accordance with the International Astronomical Union's rules for planetary nomenclature.[1] It is a proposed landing site for the future Mars rover Mars Science Laboratory.[2]

Landforms in the crater provide strong evidence of the prior existence of flowing water on Mars.

Contents

Mars Science Laboratory

Several sites in the Margaritifer Sinus quadrangle have been proposed as areas to send NASA's next major Mars rover, the Mars Science Laboratory. Eberswalde Crater made the cut to be among the top four. Eberswalde Crater contains a delta.[3]

The aim of the Mars Science Laboratory is to search for signs of ancient life. It is hoped that a later mission could then return samples from sites identified as probably containing remains of life. To safely bring the craft down, a 12 mile wide, smooth, flat circle is needed. Geologists hope to examine places where water once ponded.[4] They would like to examine sediment layers.

Eberswalde Delta

The delta, seen by MGS

The crater contains a fossilized and exhumed delta which was formed by the flow of a liquid, most likely water. The series of valleys leading into the delta "drain" an area of approximately 4000 km². The surface area of the delta is 115 km², measuring 13 km by 11 km. The delta was discovered by Michael Malin and Kenneth Edgett of Malin Space Science Systems through imagery taken by the Mars Global Surveyor in 2003.

The delta also provides unambiguous evidence that some Martian sedimentary rocks have been deposited in a liquid. The meandering of the channels provides evidence to support this. Additional sediments were deposited on top of the delta, burying it. The deposits in the channels formed sedimentary rock. As the surrounding softer sediments were eroded away, the delta was exhumed, but inverted.[5][6]

Based on an estimate by Moore et al. in 2003 of flow volume to the crater at 700 m3/s, it is estimated that it would take twenty years to completely fill the crater, ignoring evaporation and infiltration. However, this is unlikely because it is hypothesized that the delta was not formed in a permanent lake but rather a series of short lacustrine episodes on the order of years. This suggests that the Martian climate at the Noachian epoch time of formation was characterized by a series of short, wet spells rather than a sustained wet climate.[7][8]

References

See also

External links

Coordinates: 24°S 33°W / 24°S 33°W / -24; -33

Advertisements

Advertisements






Got something to say? Make a comment.
Your name
Your email address
Message