F2
Lesson Summary
Vocabulary Link
- mafic lava
- viscosity
- pahoehoe lava
- aa lava
- felsic lava
- shield volcano
- composite volcano
- stratovolcano
- pyroclastic material
- cinder cone
- caldera
- volcanic neck
- dike
- sill
- batholith
- laccolith
- basalt columns
- supervolcano
- Lava is categorized into two main types: mafic lava (low viscosity and low gas content) and felsic lava (high viscosity and high gas content).
- Volcanoes are usually classified into three major types: shield, composite/stratovolcano, or cinder cone.
- Shield volcanoes are low-angled basaltic volcanoes.
- Composite cones are steep-sided, largely non-basaltic, and are made of alternating layers of lava and pyroclastic material.
- Cinder cones are small, steep-sided volcanoes that are largely non-basaltic.
- Other volcanic landforms include calderas, volcanic necks, dikes, sills, batholiths, laccoliths, and basalt columns.
- Supervolcanoes are massive volcanic events that result in more than 1,000 cubic kilometers (240 cubic miles) of material being ejected during the eruption.