RADIOACTIVE ELEMENTS HAVE A PROVEN CONSTANT DECAY RATE RADIOACTIVE ELEMENTS HAVE A PROVEN CONSTANT HALF-LIFE NECESSARILY, A DATABLE MATERIAL MUST.
By Dane and Patrick. Early Cretaceous Epoch - from 145.5 – 127 million (Neocomian) years ago. Middle Cretaceous Epoch – from 127 – 89 million years (Gallic)
