Questions and Answers
Which of the following are types of volcanoes? (Select all that apply)
What type of volcano is characterized by broad, gently curved slopes?
Shield Volcano
Composite volcanoes are made mostly of ______ rocks like andesite.
intermediate-composition
Volcanic Domes are typically larger than Shield Volcanoes.
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What is the smallest type of volcano?
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Which type of volcano has slopes that are moderately steep and symmetrical?
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What type of eruptions typically form a Volcanic Dome?
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Study Notes
Types of Volcanoes
- Four main types: scoria cone, shield volcano, composite volcano, volcanic dome
- Construct hills and mountains, varying in eruption styles and sizes
Scoria Cone
- Smallest type, typically hundreds of meters tall
- Characterized by steep slopes and a small crater at the summit
- Composed mainly of basaltic and andesitic rock, featuring volcanic cinders and bombs
- Often formed from single eruptive episodes
- Can occur near composite and shield volcanoes
Shield Volcano
- Features broad, gently sloping sides; can range from less than a kilometer to tens of kilometers wide, rising thousands of meters
- Often includes craters or fissures at the summit
- Primarily consists of basaltic lava flows, with minor amounts of scoria and volcanic ash
- Can be the largest type of volcano, formed by multiple eruptions over time
Composite Volcano
- Typically symmetrical with moderately steep slopes and thousands of meters in height
- Possesses a prominent crater at the top
- Known for interlayering of lava flows, pyroclastic deposits, and volcanic mudflows
- Composed mainly of andesite, with variations including felsic and mafic rocks
- Generally smaller than the largest shield volcanoes; formed through multiple eruptions
Volcanic Dome
- Often a rounded shape, may reach hundreds of meters in height
- Contains solidified lava, which can be either fractured or intact, mixed with volcanic ash and rock fragments
- Forms when highly viscous felsic or intermediate magma erupts and accumulates around a vent
- Commonly found within craters of composite volcanoes
- Comparable in size to small scoria cones; formed during single eruptive episodes
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Description
Explore the four main types of volcanoes: scoria cone, shield volcano, composite volcano, and volcanic dome. This quiz covers their structures, eruption types, and relative sizes. Perfect for understanding volcanic formations in geology.
