Thick layers of clean ice which is made of snow that is compacted together and thin layers of dirty snow formed when melt water mixes with dirt and the next winter it freezes . By Nate 15. It was founded in 1872. By Eliza 16. By Nick 17.
Geothermal energy lies underneath the hotspots on the surface.
There are large thermal sections that can be used to provide geothermal energy, a source of heat and electrical power. By Elizabeth 18. By Nate 19. Yellowstone National Park.