radiocarbon dating, isotopic, microfossils, coprolites, geochronology, middle paleolithic, spectroscopic analysis, neandertal, pliocene, fossils, interglacial, lavas, eocene epoch, chondrites, mesolithic, hominoids, acheulian, upper paleolithic, cambrian period, phylogenies, sediments, paleoecology, radioactive decay, foraminifera, archeopteryx, paleoclimatology, hadean, aurignacian, nitrogen fixation, paranthropus, habilis, eocene, carboniferous period, stromatolite, deglaciation, palaeo, aragonite, fossilization, mineralogy, strontium, blackbody, antineutrino, chondrules, archaeopteryx, biogenic, petrography, formamide, crinoid, cenozoic, lower paleolithic, mammoths, anthropoids, braincase, paleocene, quaternary period, measurements, neogene, tetrapod, apatite, angiosperm, plastids, coprolite, carboniferous, pleistocene, abiogenesis, magmas, phanerozoic, concretions, ostracods, palaeontological, potsherds, prokaryotes, cenozoic era, noachian, oligocene epoch, otoliths, paleobiology, archaean, arsenate, spicule, ordovician, otolith, bryozoans, diatom, hominid, phyllosilicate, hydrologic cycle, columbian mammoth, eukaryote, megafauna, australopithecines, spectrometry, geoid, middens, neolithic age, conodonts, zeolites, crystallites, volcanism, quasicrystal, morphologies, devonian period, dates, calibrations, datings, observations, tabulations, chronologies, estimations, excavation, excavations, experiments, fieldwork, investigations, pesticides, pre, tests, transcriptions, concentrates, data, determinations, radiometric, paleomagnetic, dendrochronological, chronometric, palaeomagnetic, microchemical, semiquantitative, approximate, 14, colorimetric, immunochemical, paleontological, quantitative, retest, spectrographic, triplicate, gravimetric, manometric, radioisotopic

libby, willard frank libby

atomic number 6, c, carbon

carbon 14