| Almost all of the volcanic rocks within and adjacent to the calderas have been propylitically altered. |
| 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. |
| Intrusion of more magma into the chambers renewed doming of the collapsed calderas in an episode of resurgence. |
| These four landform types are called lava flows, volcanic peaks, calderas, and volcanic necks. |
| Most of the deposits are classified as gold silver deposits concentrated at volcanic cupolas and calderas. |
| 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. |
