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Coordinates: 1°54′S 354°30′E / 1.9°S 354.5°E / -1.9; 354.5
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Changing short description from "Alrock outcrop on Mars" to "Rock outcrop on Mars"
 
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{{Short description|Rock outcrop on Mars}}
{{MarsGeo
{{Infobox feature on celestial object
|name=Last Chance
|name = Last Chance
|image=[[Image:PIA05482 modest.jpg|200px]]
|image = [[Image:PIA05482 modest.jpg|200px]]
|caption=Last Chance rock on Mars
|caption = "Last Chance" [[rock outcrop]] on Mars.
|type=Rock
|type = [[Rock outcrop]]
|latitude=1.9
|coordinates = {{coord|1.9|S|354.5|E|globe:mars_type:landmark|display=inline,title}}
|N_or_S=S
|longitude=354.5
|E_or_W=E
}}
}}


'''Last Chance''' is a layered rock outcrop found on [[Mars]], discovered by the [[Mars Exploration Rover]] ''[[Opportunity rover|Opportunity]]'' in March 2004. The rock lies within the outcrop near the rover's landing site at [[Meridiani Planum]], [[Mars]].
'''Last Chance''' is a layered rock outcrop found within the [[Margaritifer Sinus quadrangle]] (MC-19) region of the planet [[Mars]], discovered by the [[Mars Exploration Rover]] ''[[Opportunity rover|Opportunity]]'' in March 2004. The rock lies within the outcrop near the rover's landing site at [[Meridiani Planum]], Mars.


Images returned show evidence for a geologic feature known as [[Stratum|ripple cross-stratification]]. At the base of the rock, layers can be seen dipping downward to the right. The bedding that contains these dipping layers is only one to two centimeters (0.4 to 0.8 inches) thick. In the upper right corner of the rock, layers also dip to the right, but exhibit a weak "concave-up" geometry. These two features -- the thin, cross-stratified bedding combined with the possible concave geometry -- suggest small ripples with sinuous crest lines. Although wind can produce ripples, they rarely have sinuous crest lines and never form steep, dipping layers at such a small scale. The most probable explanation for these ripples is that they were formed in the presence of moving water.<ref>[http://www.jpl.nasa.gov/missions/mer/images-print.cfm?id=1022 "Last Chance" Evidence of Ancient Water Flow]</ref>
Images returned show evidence for a geologic feature known as [[Ripple marks|ripple]] [[cross-stratification]]. At the base of the rock, layers can be seen dipping downward to the right. The bedding that contains these dipping layers is only one to two centimeters (0.4 to 0.8 inches) thick. In the upper right corner of the rock, layers also dip to the right, but exhibit a weak "concave-up" geometry. These two features—the thin, cross-stratified bedding combined with the possible concave geometry—suggest small ripples with sinuous crest lines. Although [[wind]] can produce ripples, they rarely have sinuous crest lines and never form steep, dipping layers at such a small scale. The most probable explanation for these ripples is that they were formed in the presence of moving [[Water on Mars|water]].<ref>{{Cite web |url=https://photojournal.jpl.nasa.gov/catalog/PIA05625|title="Last Chance" Evidence of Ancient Water Flow|access-date=March 4, 2021}}</ref>
{{-}}


==See also==
==See also==
* [[List of rocks on Mars]]
* [[List of rocks on Mars]]
* [[List of surface features of Mars imaged by Opportunity|List of surface features of Mars imaged by ''Opportunity'']]


== References ==
== References ==
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==External links==
==External links==
*[http://mars.jpl.nasa.gov/ Nasa's Mars Exploration Program]
*[https://mars.nasa.gov/ Nasa's Mars Exploration Program]
{{MarsRocks}}
{{Features visited by Opportunity}}
{{Mars}}
{{Portal bar|Solar System}}

[[Category:Mars Exploration Rover mission]]
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[[Category:Rocks on Mars]]



{{Mars-stub}}
{{Mars-stub}}
{{crater-stub}}
{{crater-stub}}

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[[Category:Rocks on Mars]]

Latest revision as of 11:17, 8 June 2022

Last Chance
"Last Chance" rock outcrop on Mars.
Feature typeRock outcrop
Coordinates1°54′S 354°30′E / 1.9°S 354.5°E / -1.9; 354.5

Last Chance is a layered rock outcrop found within the Margaritifer Sinus quadrangle (MC-19) region of the planet Mars, discovered by the Mars Exploration Rover Opportunity in March 2004. The rock lies within the outcrop near the rover's landing site at Meridiani Planum, Mars.

Images returned show evidence for a geologic feature known as ripple cross-stratification. At the base of the rock, layers can be seen dipping downward to the right. The bedding that contains these dipping layers is only one to two centimeters (0.4 to 0.8 inches) thick. In the upper right corner of the rock, layers also dip to the right, but exhibit a weak "concave-up" geometry. These two features—the thin, cross-stratified bedding combined with the possible concave geometry—suggest small ripples with sinuous crest lines. Although wind can produce ripples, they rarely have sinuous crest lines and never form steep, dipping layers at such a small scale. The most probable explanation for these ripples is that they were formed in the presence of moving water.[1]

See also[edit]

References[edit]

  1. ^ ""Last Chance" Evidence of Ancient Water Flow". Retrieved March 4, 2021.

External links[edit]

Notable Rocks on Mars
Adirondack
(Spirit) 		Barnacle Bill
(Sojourner) 		Bathurst Inlet
(Curiosity) 		Big Joe
(Viking) 		Block Island
(Opportunity) M 		Bounce
(Opportunity) 		Coronation
(Curiosity) 		El Capitan
(Opportunity)
Esperance
(Opportunity) 		Goulburn
(Curiosity) 		Heat Shield
(Opportunity) M 		Home Plate
(Spirit) 		Hottah
(Curiosity) 		Jake Matijevic
(Curiosity) 		Last Chance
(Opportunity) 		Link
(Curiosity)
Mackinac Island
(Opportunity) M 		Mimi
(Spirit) 		Oileán Ruaidh
(Opportunity) M 		Pot of Gold
(Spirit) 		Rocknest 3
(Curiosity) 		Shelter Island
(Opportunity) M 		Tintina
(Curiosity) 		Yogi
(Sojourner)
The table above contains clickable links M = Meteorite - (
This box:
)


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