Learn vocabulary, terms, and more with flashcards, games, and other study tools. It is being used for domestic heating in Italy, New Zealand and Iceland. These volcanoes are very interesting to observe and to study because of their amazing occurrences and majestic lava eruptions.
When one of these large eruptions occurs, a huge amount of material is blasted out of the super volcano, leaving a massive crater or caldera. In the pahoehoe type the surface is smooth and billowy and often molded into forms resembling huge coils of rope. In a geothermal system water also serves as the medium by which heat is transmitted from a deep igneous source to a geothermal reservoir at a depth shallow enough to be tapped by drilling.
The VEI classification is still in use, despite its many limitations, such as its reliance on only a few types of measurements and its poor fit for small to moderate eruptions see Bonadonna et al.
The most important gas is steam, which may form between 60 to 90 per cent of the total gas content in a lava.
It's very interesting to know what people thought of volcanoes when the myths were made; myths about volcano are as captivating as other myths As a consequence, the feature produced is a vast shallow cavity called a Caldera.