Mount Rainer in the United States in America.
MT Fuji is located in Japan (it's a volcano!).
You find them on the side of a volcano.
You would find extrusive igneous rocks. Beyond that it depends on the volcano.
at the top
try http://www.volcano.si.edu/world/find_regions.cfm
You can. It depends on the climate the volcano is located in, the height of the volcano, and the time of year.
You could find obsidian near a volcano.
You would find extrusive igneous rocks. Beyond that it depends on the volcano.
It is lapill.
obsidian
you would find it in various different places on the volcano. there are also various different types of igneous rock, that there is on the volcano. like my answer? you don't have to use it but it would be good if you did