Earth Science

1. pluton is derived from this word
4. example of viscosity from the book
5. ejected lava fragments that harden in the air
6. when a volcano's activity ends
7. plume hotter-than-normal mantle material
8. volcanic activity that occurs within a plate
11. a pluton that forms where magma flows between parallel layers of sedimentary rock
14. Broad and gentle slopes
15. a landform made of magma that hardened in a volcano's pipe and later was exposed by erosion
16. an opening to the surface
17. large volcanic mountain composed of layers of both lava and pyroclastic deposits
21. a lens-shaped pluton that has pushed the overlying rock layers upward
22. a body of intrusive igneous rock that has a surface exposure of more than 100 square kilometers
23. the long belt of volcanoes that circles much of the Pacific Ocean
24. substance's resistance to flow

1. a scorching mixture of glowing volcanic particles and gases that sweep rapidly down the volcano's flanks
2. particles produced in volcanic eruptions
3. eruptions of lava that eventually build a mountain
9. a volcanic landform produced by a repeated eruptions of very fluid, basaltic lava
10. volcano that started to erupt in 1999 in Ecuador
12. a pluton that forms when magma moves into fractures that cut across rock layers
13. magma outside of the volcano
18. water-soaked volcanic ash and rock slide rapidly downhill
19. steep-walled depression located at the summit of a volcano
20. structures that result from the cooling and hardening of magma beneath Earth's surface