| Most of the deposits are classified as gold silver deposits concentrated at volcanic cupolas and calderas. |
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| Almost all of the volcanic rocks within and adjacent to the calderas have been propylitically altered. |
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| Intrusion of more magma into the chambers renewed doming of the collapsed calderas in an episode of resurgence. |
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| These four landform types are called lava flows, volcanic peaks, calderas, and volcanic necks. |
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| In December, members of the same research team revealed that calderas on five major Mars volcanoes were repeatedly active as little as 2 million years ago. |
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| This is in direct contrast to earlier work which argues that these calderas were not united until a central caldera formed late in the volcano's lifespan. |
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| Ring faults are faults that occur within collapsed volcanic calderas and the sites of bolide strikes, such as the Chesapeake Bay impact crater. |
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| Because of their tremendous size and steep walls, calderas often trap rainwater or melted snow and form mountaintop lakes. |
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| The lakes of both Rotorua and Taupo occupy calderas left from enormous prehistoric eruptions, and magma lies at shallow depths beneath a number of centres. |
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