A volcanic dome is a volcanic feature formed by the extrusion of extremely viscous lava. Instead of flowing away from the volcanic crater, viscous lava grows into a large dome. Domes may reach heights of several hundred metres, and can grow slowly and steadily for months or years. This article is about volcanoes in geology. ... Viscosity is a measure of the resistance of a fluid to deformation under shear stress. ... Lava is molten rock that a volcano expels during an eruption. ... The word crater may refer to A landform resembling a pit or depression in the topography that can be formed in several ways: speculation exists that a meteorite impact with another body can cause an impact crater, an electrical discharge on any scale tends to form circular craters, volcanic activity...

Volcanic domes can be very fragile structures, and often partially collapse. These dome collapses can trigger pyroclastic flows. Ultimately, many volcanic domes are destroyed by large explosive eruptions. Pyroclastic flows are a common and devastating result of some volcanic eruptions. ...

Well known examples of volcanic domes include several formed at Mount St. Helens after the large eruption of 1980, and the dome at Soufriere Hills volcano in Montserrat, which has grown and collapsed repeatedly since volcanic activity began there in 1995. Mount St. ... 1980 is a leap year starting on Tuesday. ... The Soufriere Hills volcano is a stratovolcano on the Caribbean island of Montserrat. ... 1995 was a common year starting on Sunday of the Gregorian calendar. ...