How do you get the claw fossil in Pokemon emerald?

okay here goes

first go to fallorbor town to the fossil maniacs house go through the tunnel and talk to him then go to the desert make sure that you have the mach bike then go in to the mirage tower (a tower of sand) go through using the mach bike to ride over the cracks once you get to the top you can chose between the two fossils the one on the right is the claw fossil (anorith) the other one is the root fossil (lilipeep).