Thorium-230 is a radioactive isotope of thorium, which is a naturally occurring element found in the Earth's crust. It has a half-life of about 75,000 years, meaning it takes that long for half of a sample to decay. Thorium-230 is produced through the decay of uranium-234 and is part of the uranium-thorium decay series. This isotope is primarily of interest in the fields of geology and nuclear science. It can be used in dating geological samples, helping scientists understand the age of sediments and the history of the Earth. Additionally, thorium itself is being researched as a potential fuel for nuclear reactors due to its abundance and safety features.