Читать книгу The Handy Dinosaur Answer Book - Patricia Barnes-Svarney - Страница 35
What is absolute time in relationship to geologic time?
ОглавлениеAbsolute geologic time is the (approximate) true age of the rock; that is, the absolute time that the rock layer formed. Typically, radiometric techniques, which measure the amount of radioactive decay in rocks, are used to determine absolute time.
