pyroxene grains range up to 3.5 mm. A few large olivines also occur, as large as 2.5 mm. The less abundant lithology, lithology B, resembles fine grained shergotty. The major minerals are maskelynite and clinopyroxene, with small occurrence of calcium phosphate, magnetite, silicate, and ilmenite. Dark glass appears throughout, connected with thin veinlits. This glass is of melted origin. Importance Martian meteors EETA 79001 has been shown to originate from the Martian interior, so holds great importance because of the clues it can provide about the composition and evolution of Mars. It was the first sample that provided conclusive evidence of an origin from Mars. The idea of meteorites ejected from other planets was at first not popular with scientists, as they believed such an impact would completely melt the ejected debris, EETA 79001 showed that while some portion is likely melted from impact, original rock crystals can survive the process. This meteorite is one of only 99 known meteorites discovered on earth, of Martian origin. Martian meteorites were critical in our early understanding of a planet that is both a close neighbor and physically very similar to Earth. Before lander missions, the only physical samples to be analyzed were meteorites ejected from Mars, and impacting on Earth. Debunked evidence for life on Mars Carbonate found in EETA 79001 was used as a crucial piece of evidence for potential early life on Mars. It was argued that the most likely formation of the carbonate was in liquid water by biogenic means. Today, scientists believe that the carbonate was likely formed through chemical means, and is likely not related to any life that may or may not have been on Mars. See also Geology of Mars Carbonates on Mars References Meteorites found in Antarctica Martian meteorites