They are inferred to be from Mars, based on direct comparison with Martian materials and on … Because they contain some of the same mineralogy - plagioclase, pyroxene, olivine, etc., weathering can cause most that have been here for a while to look like Earth rocks. They have isotoperatios that are said to be consistent with each other and inconsistent with the Earth. The SNC meteorites, so named for the shergottite, nakhlite, and chassigny classes which comprise this group of petrologically similar specimens, consist of 12 meteorites that share a set of similar properties that are highly anomalous compared to other meteoritic samples. Type: Nakhlite (SNC) A rain of 40 stones fell from the sky in 1911 near Nakhla in Egypt. The investigation of these characteristic properties has led to speculation that the SNC meteorites may have originated … Consequently, Martian meteorites as a whole are sometimes referred to as the SNC group. The 14 SNC meteorites are all igneous rocks, either basalts or basaltic cumulates. The SNCs either have basaltic mineralogy or some are ultramafic cumulates crystallized from basaltic melts. The falls were preceded by an appearance of a cloud and detonations, frightening local residents. The names derive from the lo… Similarly, the weathering of Earth rocks can make some resemble meteorites. A group of 32 meteorites, the SNC (S hergotty, N akhla, C hassigny) group, was derived from Mars as a product of 4–7 ejection events, probably from Tharsis and Elysium–Amazonis.

The SNC-meteorites are a group of Achondrite meteorites, by them is assumed, that they originate from the Mars. As of April 25, 2018, 192 of the 207 Martian meteorites are divided into three rare groups of achondritic (stony) meteorites: shergottites (169), nakhlites (20), chassignites (3), and ones otherwise (15) (containing the orthopyroxenite (OPX) Allan Hills 84001, as well as 10 basaltic breccia meteorites). Meteorites are "rocks", not from Earth, but from somewhere else in the solar system. Shergottite meteorites are often made of mineral grains that can't be seen clearly without a … New Mars Meteorite Found In Libya (DAG 975) (Meteoritical Bulletin - January 28, 2003) …