Examlex
Which part of the United States has present-day basins or basins preserved in its older rocks?
Lava Fountain
A fountain of molten lava propelled into the air by pressure and escaping gases.
Volcanic Dome
A rounded mound formed over a volcanic vent, created by the slow extrusion of viscous lava from a volcano.
Fissure
1. A fracture or crack on the land surface, such as that which forms by differential subsidence. 2. A magma-filled fracture in the subsurface that typically solidifies into a dike, or a linear volcanic vent erupting onto the land surface.
Volcanic Ash
Fine particles of rock and volcanic glass expelled into the air during a volcanic eruption.
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