It is in the Northeast corner of the desert.
In Pokémon Sapphire, you can choose to revive either the Claw Fossil into Anorith or the Root Fossil into Lileep. The decision is up to personal preference based on which Pokémon you prefer to have on your team.
You'll get an Anorith. CLAW fossil- anorith root fossil-lileep helix fossil- kabuto
If given to the Devon researcher in the Devon corporation the claw fossil can be revived into Anorith.
in the ground
root fossil is lileep claw fossil is anorith
The Root fossil is the Pokemon Lileep and the Claw fossil is anorith =D
To get a Lileep in Pokemon Ruby, Sapphire and Emerald you need to revive a Root Fossil. The Root Fossil can be found on Route 111 however choosing it will cost you the ability to get the Claw Fossil. Alternatively you can trade for a Lileep from another game if you've picked the Claw Fossil.
In Pokemon Sapphire, you can't catch Kabutops in the wild. You have to first obtain a Claw Fossil from the Mirage Tower on Route 111. Then take the Claw Fossil to the Devon Corporation in Rustboro City to revive it into a Kabuto. Finally, level up Kabuto to lvl 40 to evolve it into Kabutops.
The Claw Fossil is Anorith.
Go to where the desert (there's a sandstorm) is, you'll find a fossil (like a rock) and there's 2. Pick the claw fossil up not the root fossil. The other one sinks and is gone forever. The claw fossil is anorith, the root one is lileep. Then go to rustbro city and a scientist will turn the fossil to a pokemon.
You can find two fossils in the dessert where you need the go-goggles, but you can only choose one fossil. The root fossil contains the first evolve form of cradily and the claw fossil contains the first evolved form of armaldo.
In The Ruins on Route 111 you face the choice of choosing between the Root or the Claw fossil choose the Root Fossil. Bring the fossil to the Devon Corp building in Rustoboro to revive