Crater Eberswalde

Eberswalde, formerly known as Holden NE, is a partially buried impact crater in Margaritifer Terra, Mars.

Eberswalde crater lies just to the north of Holden, 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. It was one of the final four proposed landing sites for the Mars rover Mars Science Laboratory mission. This extraterrestrial geological feature lies situated within the Margaritifer Sinus quadrangle (MC-19) region of Mars. Although not chosen, it was considered a potential landing site for the Mars 2020 Perseverance rover, and in the second Mars 2020 Landing Site Workshop it survived the cut and was among the top eight sites still in the running.

Eberswalde
Crater Eberswalde
PlanetMars
RegionMargaritifer Terra
Coordinates24°S 33°W / 24°S 33°W / -24; -33
QuadrangleMargaritifer Sinus
Diameter65.3 km
Depthapprox 800 m
EponymEberswalde, Brandenburg, Germany

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

Mars Science Laboratory

Several sites in the Margaritifer Sinus quadrangle have been proposed as areas to send NASA's major Mars rover, the Mars Science Laboratory (MSL). Eberswalde was shortlisted as one of the final four proposed landing sites for the Curiosity rover, part of the MSL mission. It was voted a close second after Gale crater by a team of scientists.

MRO discovered iron/magnesium smectites here. This mineral requires water to form.

Eberswalde Delta

Crater Eberswalde 
The delta, seen by MGS

The crater contains inverted relief, an exhumed delta 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 from images acquired by the Mars Global Surveyor in 2003, operated Malin Space Science Systems. Eberswalde delta has six lobes and is about 100 meters thick.

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. Some layers of the delta contain clay. Finding clay is significant because it forms in water with a pH close to neutral. This type of environment would support life, and clay can form well-preserved fossils.

Many craters once contained lakes. The delta in Eberswalde Crater is strong evidence that a lake once existed here.

Crater Eberswalde 
A topographic map created using Mars Orbiter Laser Altimeter (MOLA) data. This map shows the elevation Eberswald crater relative to Martian areoid.

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.

See also

References

Tags:

Crater Eberswalde Mars Science LaboratoryCrater Eberswalde Eberswalde DeltaCrater EberswaldeEberswaldeGermanyHolden (Martian crater)Impact craterInternational Astronomical UnionMargaritifer Sinus quadrangleMargaritifer TerraMarsMars 2020Mars Science LaboratoryPerseverance (rover)Planetary nomenclature

🔥 Trending searches on Wiki English:

Titanic2019 Indian general election in KarnatakaBoy Kills WorldZach Wilson2024 NBA playoffsThe Ministry of Ungentlemanly WarfareItalyExhumaChristian SlaterArne SlotEuropeList of teams to overcome 3–0 series deficitsChris PhilpJoJo SiwaDream11XXXX (album)2020 AFC U-23 ChampionshipDarién GapAaron GordonWish (film)Millie Bobby BrownIsraeli–Palestinian conflictJon Bon JoviLimoneneKrushna AbhishekBenjamin FranklinBrazilGeorge LucasMark ZuckerbergMichael JacksonSean Foley (director)Adonai MitchellJustin BieberMamitha BaijuList of states of matterCatJayden DanielsNate WigginsPazzi conspiracyKirsten DunstDickey BettsGeorge VMia KhalifaShannen DohertySunny LeoneBillboard Hot 100Kalki 2898 ADVenus WilliamsAli KriegerGoogleReal Madrid CFGigi HadidNet neutralityElvis PresleyCourteney CoxList of constituencies of the Lok SabhaJosh O'ConnorTaylor SwiftGreat Glen FaultNew York CityJamie VardyMichael J. FoxKalanithi MaranRichard NixonStripchatCase 39Sunil NarineJesse PlemonsXVideos2024 Indian general election in BiharRathnam (film)Korean WarDavid PeckerAshlyn HarrisRaindrop cakeDoug Davis (businessman)🡆 More