| The ultramafic rocks are probably Jurassic or Cretaceous in age, and constitute a spoon-shaped lopolith with a dunite feeder plug at the east end. |
| Its lower part displays alternating bands of peridotite, pyroxenite, and dunite, but dunite is dominant throughout most of the unit. |
| Chromite, picotite, and magnetite also occur in dunite, as do spinel, ilmenite, pyrrhotite, and platinum in some cases. |
| Picrite and serpentinized dunite units make major contributions to the magnetic high. |
| It comprises massive websterites and clinopyroxenites, usually interlayered with relatively subordinate dunite. |
| The lowermost rocks are serpentinized dunite and harzburgite, which are best exposed in the NE of the ophiolite. |
