One of the most unusual features of the coast are these radioactive nodules from Littleham Cove. The radioactive elements almost certainly came from the Dartmoor Granite as it was eroded early in the Triassic period or possibly even in the late Permian. The radiation levels are very low, about the same as an old-fashioned luminous watch. As it oxidised over millions of years, it has turned the surrounding clay from red to grey.
Some geologists believe that the boundary of the Triassic/Permian rock layer is at the base of the Budleigh Salterton Pebble Beds, which would make the nodules Permian in age.
Find out more on the rocks and pseudofossils pages.