Figure 8-48 Pieces of the Allende Meteorite (a) This carbonaceous chondrite fell near Chihuahua, Mexico, in February 1969. Note the meteorite’s dark color, caused by a high abundance of carbon. Geologists believe that this meteorite is a specimen of primitive planetary material. The ruler is 15 cm (6 in) long. (b) Sliced open, the Allende meteorite shows round, rocky inclusions called chondrules in a matrix of dark rock.