Asked by Milan Golusin on Apr 26, 2024
Verified
Volcanic domes commonly form from all of the following rocks except:
A) basalt
B) andesite
C) rhyolite
D) obsidian
Obsidian
A generally gray to black, shiny volcanic glass, usually of felsic composition.
Andesite
A volcanic rock of intermediate composition, typically found in volcanic arcs associated with subduction zones.
Volcanic Domes
Rounded, bulbous formations of lava that accumulate near and around volcanic vents, often resulting from the slow extrusion of viscous lava.
- Understand the formation and characteristics of volcanic domes.
Verified Answer
AN
Andrew NorcrossApr 26, 2024
Final Answer :
A
Explanation :
Volcanic domes are typically formed from highly viscous lava, which allows them to maintain a dome-like shape as they cool and solidify. Basalt, being a low-viscosity lava, usually forms broad, shield volcanoes rather than steep-sided domes. Andesite, rhyolite, and obsidian have higher silica content, making them more viscous and suitable for forming volcanic domes.
Learning Objectives
- Understand the formation and characteristics of volcanic domes.