What does geochronology mean?
Geochronology is the branch of geology that establishes when geological materials formed and how sequences of rocks, fossils, and sediments relate to one another in time. It combines relative dating, which places events in order, with absolute dating methods, especially radiometric techniques that estimate numerical ages. Researchers use it to investigate the history of continents, mountain building, volcanic activity, sedimentary basins, and the evolution of life. A geochronologist may analyze minerals, rock layers, fossils, or other materials that preserve clues about past environments and events. The discipline is central to geological mapping, archaeological chronology, paleontology, and the reconstruction of Earth’s deep history. Although often discussed together, geochronology is not simply a general chronology: it focuses on scientifically determining the timing and sequence of geological processes and materials.
nounThe branch of geology concerned with determining the age and sequence of rocks, fossils, sediments, and other geological materials. It uses methods such as radiometric dating, stratigraphy, and correlation to establish relative and absolute timelines.
- The branch of geology that establishes the ages and sequence of geological materials and events, using relative dating as well as absolute methods such as radiometric dating.
"Radiometric geochronology helped the team determine the age of the volcanic layers."
"The study combined geochronology with sedimentology to reconstruct the basin’s history."
"Geochronologists used zircon crystals to date the formation of the ancient granite."
The plural is rare; academic writing usually uses the singular form.
"The researchers compared the geochronologies of two distant sedimentary basins."
Geochronology turns layers of rock into a calendar for Earth’s deep history.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of geochronology
Geochronology is a compound formed in English from the combining forms geo-, from Greek gē meaning “earth,” and chronology, from Greek chronos meaning “time,” together with the suffix -logy meaning “study of.” The components echo parallel formations such as geology and chronology, both of which also trace their roots to ancient Greek. The compound developed to designate the specific geological study of dating and sequencing events in Earth’s history.
Related word forms
How geochronology is actually used
This is formal scientific terminology. It is normally used in geology, archaeology, paleontology, and related earth sciences, and is typically modified by terms such as absolute, radiometric, or biostratigraphic.
Easily confused with geochronology
Chronology is the general study or arrangement of events in time, whereas geochronology applies dating and sequence methods specifically to geological materials and formations.