Types of Rocks
A rock formed by lava
Igneous
Rock formations that grow from the cave floor
Stalagmites
A rock formed by mud, pebbles, shells and sand
Rock formations that look like icicles
Stalactites
This rock is a kind of igneous rock that is shiny and black
Obsidian
Rock formations that grow and twist in every direction
Helictites
If a rock is full of shells, what kind of rock is it?
Sedimentary