приклади
These volcano and feeder systems have similarities to igneous centres, which also have cone-shaped edifices, calderas and downward tapering cones created during magma chamber collapse and ring-dyke intrusion.
The sequential development of multiple summit calderas of shield volcanoes gives clues about how the spatial location of shallow magma chambers evolves with time and how the magma supply into these chambers evolves.
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.
Almost all of the volcanic rocks within and adjacent to the calderas have been propylitically altered.
During resurgent doming, volcanic sediments and postcollapse lavas filled the calderas , resulting in concentric and radial fracturing of the rocks marginal to and within the domal uplift.
Other
M-translate