Here is the issue with that.
1. They used multiple different sources of different elements to develop different times based off of half lives. So it’s not guess work.
2. The fossil record shows speciation in different geological layers. We don’t see bipedal apes in the Cretaceous. We don’t see humans in the Cretaceous. We don’t see T. rex or any other creature in the same time period with tool marks on their bones and so on. Each layer has different species from big and small, plant and animal, that is not in other layers.
1. They used multiple different sources of different elements to develop different times based off of half lives. So it’s not guess work.
2. The fossil record shows speciation in different geological layers. We don’t see bipedal apes in the Cretaceous. We don’t see humans in the Cretaceous. We don’t see T. rex or any other creature in the same time period with tool marks on their bones and so on. Each layer has different species from big and small, plant and animal, that is not in other layers.
Layers dont necessarily mean the oldest layer is on the bottom and the newest layer is in the top. anyone whos ever made a trifle can have turned it upside down.Also when layers are laid down, often the lightest floats to the top. there has also been fossils of trees across layers.