Sometimes domes are produced by repeated outpourings of short flows from a summit vent, and, occasionally, extremely viscous lava is pushed up from the vent like a short protrusion of toothpaste from a slightly squeezed tube.
Shield Volcano volcanoes are the largest volcanoes on Earth. The Hawaiian shield volcanoes are the most famous examples. Shield volcanoes are almost exclusively basalt, a type of lava that is very fluid when erupted.
The Ural Mountains are among the world’s oldest mountains, 300 to 250 million years old, and erosion has lowered them considerably. For its age, the elevation of the mountains is unusually high.
The Harz range consists of an irregular series of terraced plateaus (primarily of slates, sandstones, and limestones) that rise in places into rounded summits and are intersected by narrow, deep valleys.
It is a well-known rock formation in the park, named for its distinct shape. One side is a sheer face while the other three sides are smooth and round, making it appear like a dome cut in half