Mackinac Island meteorite

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Mackinac Island meteorite
Mackinac Island.jpg
Type Iron
Parent body Unknown
Composition Nickel, iron, Kamacite, taenite[1][2]
Weathering grade Large-scale, cavernous weathering[2]
Country Mars
Region Meridiani Planum
Coordinates 02°07′02″S 05°31′22.43″W / 2.11722°S 5.5228972°W / -2.11722; -5.5228972Coordinates: 02°07′02″S 05°31′22.43″W / 2.11722°S 5.5228972°W / -2.11722; -5.5228972[3]
Observed fall No
Fall date Possibly late Noation
Found date 2009-10-13[4]
Strewn field Possibly[5]

Mackinac Island meteorite was found on Mars by the Opportunity rover on 2009-10-13.


Mackinac Island was the third of three iron meteorites encountered by the rover on Meridiani Planum within a few hundred meters, the others being Shelter Island and Block Island.[2]

Mackinac Island may have fallen on Mars in the late Noachian period and is extensively weathered.[2][5]



See also[edit]


  1. ^ Nemiroff, Robert; Jerry Bonnell (13 August 2009). "2009 August 13". Astronomy Picture of the Day. NASA. Retrieved 5 January 2013. 
  2. ^ a b c d Ashley, J. W.; et al (July 2011). "Evidence for mechanical and chemical alteration of iron-nickel meteorites on Mars: Process insights for Meridiani Planum". Journal of Geophysical Research: Planets (1991–2012) 116 (E7). doi:10.1029/2010JE003672. Retrieved 5 January 2013. 
  3. ^ Google Mars
  4. ^ ATKINSON, NANCY (18 October 2009). "Opportunity Discovers Still Another Meteorite! Find It on Google Mars". Universe Today. Retrieved 5 January 2013. 
  5. ^ a b Beech, Martin; Ian M. Coulson (2010). "The making of Martian meteorite Block Island". Monthly notices of the Royal Astronomical Society 404. doi:10.1111/j.1365-2966.2010.16350.x. Retrieved 5 January 2013.