Geologic Age Dating Explained - Kids Discover The majority of the time fossils are dated using relative dating ques. There are two basic approaches relative geologic age dating, and absolute. Say for example that a volcanic dike, or a fault, cuts across several sedimentary. interval of time, or on radioactive decay of specific isotopes.
Radiometric Dating Methods, Uses & the Snificance of Half-Life. Scientists can use certain types of fossils referred to as index fossils to assist in relative dating via correlation. For example, uranium-lead dating can be used to find the age of a. With radiocarbon dating, the amount of the radioactive isotope carbon-14 is measured.
Radioactive Decay - SERC-Carleton Using relative dating the fossil is compared to something for which an age is already known. Teaching example using popcorn to teach radioactive decay. Remind them that geologists only use certain radioactive isotopes to date rocks. Radiometric dating is the method of obtaining a rock's age by measuring the.