Editing noise settings of just one biome?

[jaunty zephyr]

Hey! I want to edit the birch forest biome to have a different type of stone. How would I replace the stone without completely replacing the entire noise setting?

[tall wagon]

See here’s the fun part

You don’t

[brittle jungle]

You could place a whole lot of diorite blobs but with your custom stone type, that’s how they do it for the basalt deltas