084 N of Aquifer Caverns base camp: After roping across the pool and entering the burial chamber, look for a Relic tucked away in between two shelves of skulls.
085 S of Aquifer Caverns base camp: A Document is close to the campfire, down some stairs by a beached blue boat.
086 SE of Aquifer Caverns base camp: A Document is in the middle of the large pool of water, on the stone with columns.
087 SE of Aquifer Caverns base camp: A Relic is in the room with the Codex, on the floor.