Their activities can form cryptodomes, which, when moved from their original location, are known as coulees.
Extremely blocky, steep-sided types of these landforms occur when they form under glaciers, and are known as tuyas. Their activities can form cryptodomes, which, when moved from their original location, are known as coulees. Their actions are sometimes described as phreatic or (*) plinian depending on whether they create large amounts of steam. They can create flows of pahoehoe or aa, and they come in composite, shield, and cinder cone varieties. For 10 points, name these openings in the earth's crust that allow magma to come to the surface, exemplified by Krakatoa and St. Helens.
Extremely blocky, steep-sided types of these landforms occur when they form under glaciers, and are known as tuyas.
{volcanos}