Those locations, with their high concentrations ("high" being "greater than 0.01%-ish") of heavy metals, of which mazanite is but one of many, are the rare exce

Those locations, with their high concentrations ("high" being "greater than 0.01%-ish") of heavy metals, of which mazanite is but one of many, are the rare exception. The IAEA report on Guarapari specifically says "it's weirdly high, brah": >The exposure level due to monazite sand radiation in Areia Preta beach, Guarapari, is high. The activity concentration of 232Th in Areia Preta is higher than others beaches in world studied. The values of the absorbed dose rate in air and outdoor annual effective dose rate in Areia Preta beach are higher than the world averages due the content of 232Th. Areia Preta is also has higher background found in beaches in world. https://inis.iaea.org/collection/NCLCollectionStore/_Public/43/046/43046452.pdf https://inis.iaea.org/collection/NCLCollectionStore/_Public/...