10 Questions
Which type of rocks are solidified from lava on the Earth's surface?
Extrusive rocks
What type of volcanic eruption can produce broad plateaus?
Fissure eruptions
Which type of magma composition is less commonly associated with volcanic eruptions?
Felsic
What is the most abundant volcanic gas released during eruptions?
Water vapor (H2O)
In addition to water vapor, carbon dioxide, and sulfur dioxide, which gas is also considered an important volcanic gas?
Hydrogen sulfide (H2S)
What type of lava flow is characterized by a smooth, 'ropey' surface?
Pahoehoe
What is the term for large, streamlined masses of lava that are ejected as liquids and solidify in the air?
Bombs
What is the most common type of lava erupted on Earth, with over 90% being this type?
Basaltic
Which volcanic flow type is extremely dangerous, consisting of hot ash and rock fragments infused with expanding volcanic gases?
Nuée ardente flows
What is the term for a mudflow that results from pyroclastic materials saturated with water moving downhill?
Lahar
Test your knowledge on volcanism and volcanic rocks. Learn about how volcanic rocks solidify from lava, the formation of volcanoes, fissure eruptions, flood basalts, and the importance of volcanism as a geologic process.
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