I am going to tell you about some different types of valcanoes. Composite valcanoes have steep sides. They also have a layer of lava that is mixed with sand. The lava and sand is what builds the valcano.
A sheild valcano is hundreds of miles wide and ten thousands of miles high. Sheild valcanoes consist almost entirely of frozen lava, and have low slopes. this valcano also has large craterson the summit.
The gint caldera is the largest of the valcanoes. This valcano can be as big as the yellow stone park! they can blow ash out thousands of miles away!
The last valcano is called a cindercone. It is made of loose gravel, sand and has barely any lava. This valcano is miles wide and thousands of feet high! When this valcano eurups it shoots out cinders and that is how it got its name!
and those are most of the valcanoes and their lavas