These ore bodies formed in different places along a ring fault in the caldera.
2.
The ring intrusives are high silica bodies which were intruded along ring faults associated with caldera collapse.
3.
In Cordillera Nevada this volcanism was expressed from about 117, 000 years ago primarily as ring faults.
4.
Activity after the caldera's formation created lava domes and rhyolitic lava flows along its ring faults.
5.
The deep crater, across, is surrounded by a flat-floored terrace-like ring trough with an outer edge of collapsed blocks forming ring faults.
6.
The structure that makes a resurgent dome possible is a fracture zone made up of ring faults surrounded by concentric normal faults around the outside of the rings.
7.
During initial formation of the caldera these ring faults provide vents for ash-flow eruptions and are the point at which subsidence of the cauldron block occurs.
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