Last Chance (Mars)

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Last Chance
PIA05482 modest.jpg
"Last Chance" rock outcrop on Mars.
Feature type Rock outcrop
Coordinates 1°54′S 354°30′E / 1.9°S 354.5°E / -1.9; 354.5Coordinates: 1°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]

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Notable Rocks on Mars
Adirondacksquare.jpg
PIA00819left-MarsRock-BarnacleBill.gif
PIA14762-MarsCuriosityRover-BathurstInletRock.jpg
MarsViking1Lander-BigJoeRock-19780211.jpg
Block Island.jpg
58606main image feature 167 jwfull.jpg
MarsCuriosityRover-CoronationRock-N165-20120817-crop.jpg
El Capitan sol27 pancam.jpg
Adirondack
(Spirit)
Barnacle Bill
(Sojourner)
Bathurst Inlet
(Curiosity)
Big Joe*
(Viking)
Block Island
(Opportunity) M
Bounce
(Opportunity)
Coronation
(Curiosity)
El Capitan
(Opportunity)
PIA17074-MarsOpportunityRover-EsperanceRock-20130223-fig1.jpg
PIA16187-MarsCuriosityRover-GoulburnRock-20120817-crop.jpg
PIA07269-Mars Rover Opportunity-Iron Meteorite.jpg
PIA09089-RA3-hirise-closeup annotated.png
PIA17062-MarsCuriosityRover-HottahRockOutcrop-20120915.jpg PIA16192-MarsCuriosityRover-Target-JakeRock-20120927.jpg
PIA05482 modest.jpg
NASA Curiosity rover - Link to a Watery Past (692149main Williams-2pia16188-43).jpg
Esperance*
(Opportunity)
Goulburn
(Curiosity)
Heat Shield
(Opportunity) M
Home Plate
(Spirit)
Hottah
(Curiosity)
Jake Matijevic
(Curiosity)
Last Chance
(Opportunity)
Link
(Curiosity)
Mackinac Island.jpg
Mars rock Mimi by Spirit rover.jpg
PIA13418 - Oileán Ruaidh meteorite on Mars (false colour).jpg
Pot of gold upclose.jpg
PIA16452-MarsCuriosityRover-Rocknest3Rock-20121005.jpg
391243main-MarsRover-ShelterIslandMeteorite-20091002-crop.jpg
PIA16795-MarsCuriosityRover-TintinaRock-Context-20130119.jpg
NASA-MarsRock-Yogi-SuperRes.jpg
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)
|(Notes: * = links to relevant article; M = Meteorite)