Lherzolite, anorthosite, gabbro, and basalt dredged from the mid-Indian ocean ridge.
The Central Indian Ridge is mantled with flows of low-potassium basalt of uniform composition. Gabbro, anorthosite, and garnet-bearing lherzolite are exposed in cross fractures, and lherzolite is the bedrock at the center of the ridge. The Iherzolites are upper-mantle rock exposed by faulting.
Engel
C G
CG
Fisher
R L
RL