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These collectibles are arranged in their order placement in the Notebook screen.
This is found in the enclosed excavation site far north of Cut Cliff. You’ll encounter this location during the story quest after checking out Olin’s house in Meridian. Otherwise, the site will be empty when you visit it another time. The ancient debris is found in the base of the slope leading outside the site.
The ancient debris is located a short distance northeast of the campfire before reaching Maker’s End. It’s located on the slope beside the ruined building.
You can find this ancient debris immediately after following the dirt path leading up to the Dimmed Bones area. It should be immediately visible before reaching the building ruins.
This is found inside the hollow interior of the building ruins in Maker’s End. You have to fight through cultists and corrupted machines in two smaller areas before reaching the building ruins containing the ancient debris that connects to a larger excavation area.