The amazing story of the pebble!

I was digging a big hole for my new apricot tree when I saw a big pebble.  So I took it and said "Where did you come from pebble? Were you part of volcano and exploded into tiny tiny pièces?  You were burnt and then got colder. Then suddenly the lava came back and the pebble travelled for hundreds of kilometres.  It is 480 million years ago.