How Were Absolute Ages Added to the Geologic Time Scale

Q3: What fact makes radiocarbon dating possible?

Q7: A body of rock that is intruded

Q14: If an isotope has a half-life of

Q26: What do unconformities represent?

Q43: Uranium 235 decays to lead 207 by

Q44: How are marker beds used to determine

Q54: Describe how the carbon-14 dating technique works.

Q63: What criteria are used to correlate rock

Q66: Fossils are found almost exclusively in sedimentary

Q69: What sort of instrument is used to