Geochronology is the science of dating and determining the time sequence of events in the history of the Earth.
This web page provides an overview of selected geochronology methods used by USGS scientists.
Cannot form a basis of absolute dating, but on an individual site, chem, dating can distinguish bone on different age found in apparent stratigraphic association Duration of different artifact styles that governs seriation Artifacts are arranged acc.
to frequencies of their co-occurrence in specific contexts Ordering of physical remains in a series so that adjacent items in the series are more similar to each other than items farther apart. Relies on principally measuring changes in proportional abundance, or frequency, of ceramic style.
But, how can we determine how old a rock formation is, if it hasn’t previously been dated?
Scientists can use certain types of fossils referred to as index fossils to assist in relative dating via correlation.
Assignment of an age to a physical remain based on the association with other remains of known age.