THE discovery1 of iron meteorite fragments with the structure of medium octahedrites in the neighbourhood of the Wolf Creek meteorite crater compounded a curiosity. The Boxhole and Henbury craters were already known to be associated with meteoritic debris which has the structure of medium octahedrites and although such structures are relatively common among iron meteorites—Hey's2 catalogue shows them to represent 36 per cent of all classified irons—coincidence of structures has caused speculation that two or more of these crateririg events were produced by fragments of the same meteoroid.