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Julesburg meteorite (L3.6)

Julesburg is an L3.6 olivine-hypersthene chondrite. "Originally one large piece weighing 56.6 kg (124.5 lb) was recovered in 1983 from the Julesburg landfill where it had been discarded. Because it looked different and was heavy compared to local rocks, Ray Anderson, the landfill manager, decided to save it. Other smaller pieces have since been found in the fields south of Julesburg. It is scientifically important because it contains pre-solar grains, elements that formed in the interstellar medium older than the formation of our Solar System." - Colorado School of Mines Geology Museum

For more details about this, go to its Meteoritical Bulletin page: Julesburg