The second subgroup contains ultrabasic rocks and volcanic sedimentary featuring a non-uniform medium permeability.
2.
Underground waters in general are not common in the area but are assumed to be in the depths of limestone and ultrabasic rocks.
3.
The fault possibly continues through weak talc containing ultrabasic rocks and into the Gell River Fault about north, which has an older Late Pleistocene displacement.
4.
The structural mountains on the extreme eastern and western portions of the island show broad exposures of Mesozoic rock with ultrabasic rocks at the surface in many places along the east coast.
5.
Enclosed within the micaschists are basic and ultrabasic rocks of the Roche Noire Massif ( near the hamlet " La Valade " ), mainly metatuffs enclosed within the paragneisses, the micaceous paragneisses and in the Payzac Quartzite.
6.
The Chinese Academy of Geological Sciences has conducted studies in the area, identifying " diamond orebodies of diamondiferous ultrabasic rock type in Dongqiao and Lhobsa of Amdo County, northern Tibet . " The village of Dongqiao is noted for its hot spring, Jipu.
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