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NASA’s Curiosity rover has encountered a massive iron meteorite on Mars. At roughly two meters (6.5 feet) wide, and who knows how much beneath the surface, the meteorite (dubbed “Lebanon”) might be the largest ever discovered on Mars. In other news, Curiosity recently celebrated its first Martian anniversary on the Red Planet (almost two Earth years), and is now about two thirds of the way to its primary target of Mount Sharp, which it should reach in early 2015. Perhaps most interestingly, Curiosity recently passed into a region of terrain that is much more likely to yield exciting geology data and dramatic photos of the Martian landscape.
While iron meteorites are relatively rare on Earth, almost every meteorite discovered on Mars has been iron. No one quite knows why, but it’s probably down to iron meteorites being resistant to Martian erosion processes (wind, water, freeze/thaw, etc.) Without digging Lebanon up it’s hard to say just how big it is, but with a width of 6.5 feet, and presumably a sizable portion of it hidden beneath the surface, it’s probably pretty darn huge. According to NASA, the oddly shaped cavities on the surface of the meteorite are probably caused by erosion along crystalline boundaries — or alternatively that the meteorite is a rare example that started life near the core of an asteroid, and that the gaps once contained olivine crystals that have long eroded away.
originally posted by: theantediluvian
a reply to: Ghost147
That's a big! Is it in a crater of any kind? Admittedly, I don't know much about the erosion process on Mars but I'm wondering if the crater could have been mostly eroded away, exposing this thing?
originally posted by: theantediluvian
a reply to: Ghost147
That's a big! Is it in a crater of any kind? Admittedly, I don't know much about the erosion process on Mars but I'm wondering if the crater could have been mostly eroded away, exposing this thing?
originally posted by: theantediluvian
a reply to: Ghost147
That's a big! Is it in a crater of any kind? Admittedly, I don't know much about the erosion process on Mars but I'm wondering if the crater could have been mostly eroded away, exposing this thing?
originally posted by: Ghost147
Interesting thought. I with you on not knowing enough about mars. All I know is that they have those crazy, global sandstorms. I wouldn't be surprised if one of those uncovered this. But, it would be cool if it was nice and fresh
originally posted by: wildespace
"Lebanon", eh? I wonder if it was named after Israel's Iron Dome defence program, which primarily intercepts Hezbollah rockets fired from Lebanon.
This find isn't exactly news, but it's nice to see the official well-processed image that brings out so many details. The meteorite was found in May this year: mars.nasa.gov...
As you can see from the image, there's actually another one lying nearby.