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Originally posted by mikesingh
But here's something interesting. Some of these little spherules when seen in infra red are reddish in colour!
Originally posted by zorgon
Been There ...Done That...
They are hematite nodules... and they cover an area the size of Oklahoma... good source of iron ore for building Mars bases
Oh yeah and it means there was a LOT of water on Mars once upon a time...
Originally posted by mikesingh
And therefore life! Cheers!!
Originally posted by merka
Originally posted by mikesingh
But here's something interesting. Some of these little spherules when seen in infra red are reddish in colour!
That doesn't make any sense to be honest, since most of the red things are clearly NOT spheres. Comparing with the regular image, its a quite simple translation: The brighter the stone (or whatever they are) the more red it is.
Originally posted by mikesingh
are reddish in colour!
Source.
Hematite is one of few minerals found on Mars
that can be linked directly to water-related processes.
The potential role of biomediation in the precipitation
of some terrestrial hematite concretions can hold
important clues in the search for extraterrestrial life.
The study of the terrestrial analogs will increase our
insight to understanding fluid flow history and the
possibilities of life on Mars.
Source.
Early this year, scientists announced the discovery of tiny, spherical grains of hematite, a type of iron oxide, in some Martian sediments. Those spherules were dubbed blueberries because their distribution within the sediments reminded one of the scientists of blueberries in a muffin. The hematite blueberries provided one of several lines of evidence that suggest water once flowed on the Red Planet (SN: 3/6/04,p. 147). Although many of the Martian blueberries examined by NASA's Opportunity rover were still embedded in rocks, erosion had freed others.
The same type of iron oxide concretions form within some Utah sandstones, says Marjorie A. Chan, a geologist at the University of Utah in Salt Lake City. These terrestrial nodules come in spherical, ovoid, and lumpy shapes and can measure 20 centimeters or more across, while their Martian analogues are typically spherical and range up to only 5 millimeters in diameter.