Geological Time and Age Dating
Geological time (fossils and isotopes)
http://pubs.usgs.gov/gip/fossils/contents.html
http://pubs.usgs.gov/gip/geotime/
Radioisotopes in dating landscapes
Dating of Fossils (includes use of radiometric dating)
Geological time (fossils and isotopes)
http://pubs.usgs.gov/gip/fossils/contents.html
http://pubs.usgs.gov/gip/geotime/
Radioisotopes in dating landscapes
Dating of Fossils (includes use of radiometric dating)