Geochronology

（重定向自Geochronologist）

A schematic depiction of the major events in the history of Earth

Tephra horizons in south-central Iceland. The thick and light-to-dark coloured layer at the height of the volcanologists hands is a marker horizon of rhyolitic-to-basaltic tephra from Hekla.

Geochronology is the science of determining the age of rocks, fossils, and sediments using signatures inherent in the rocks themselves. Absolute geochronology can be accomplished through radioactive isotopes, whereas relative geochronology is provided by tools such as palaeomagnetism and stable isotope ratios. By combining multiple geochronological (and biostratigraphic) indicators the precision of the recovered age can be improved.

单词	Geochronologist
释义	Geochronologist 原声例句科学60秒-科学美国人 2021年11月合集 Jahandar Ramezani of the Massachusetts Institute of Technology is a geochronologist. Jahandar Ramezani 是麻省理工学院的一名地球年代学家。英语百科 Geochronology （重定向自Geochronologist） Geochronology is the science of determining the age of rocks, fossils, and sediments using signatures inherent in the rocks themselves. Absolute geochronology can be accomplished through radioactive isotopes, whereas relative geochronology is provided by tools such as palaeomagnetism and stable isotope ratios. By combining multiple geochronological (and biostratigraphic) indicators the precision of the recovered age can be improved.
随便看	ultraharmonic oscillation的意思 ultraharmonic resonance的意思 ultraharmonics的意思 ultra harmonics的意思 ultraharmonic vibration的意思 ultrahazardous的意思 Ultrahazardous activities的意思 Ultrahazardous activity的意思 Ultra HD的意思 UltraHD的意思 Ultra HDTV的意思 ultraheat的意思 ultraheavy的意思 ultrahertzian waves的意思 ultrahigh的意思 ultrahigh access memory的意思 ultrahigh altitude burst的意思 Ultra High Definition Video的意思 ultrahigh density fabric的意思 ultrahigh dose的意思 ultrahigh dose rate的意思 ultrahigh dynamic strain indicator的意思 ultrahigh dynamic strainometer的意思 ultrahigh energy的意思 ultrahigh energy accelerator的意思