| Together, the howardites, the eucrites, and the diogenites form the most abundant class of achondrites in our collections. |
| Howardites are polymict breccias composed of angular clasts of eucrites and diogenites welded together by pulverized mineral dust. |
| The exception is a group of meteorites called howardites, eucrites, and diogenites. |
| This research represents a continuing effort to understand the petrogenesis of diogenites and their relationship to eucrites. |
| Because diogenites have a coarse-grained texture with large interlocking crystals, however, they must have cooled more slowly than the eucrites. |
| In addition, individual fragments of eucrites and diogenites are often found within the howardites. |
