So sánh phương pháp

	Niên đại địa từ khảo cổ	Tephrochronology
Lĩnh vực	Khảo cổ học	Khảo cổ học
Họ	Process / pipeline	Process / pipeline
Năm ra đời	1968	1944
Người khởi xướng	Robert Coe	Sigurdur Thorarinsson
Loại	Magnetic reference frame dating	Volcanic marker dating technique
Công trình gốc	Coe, R. S. (1968). The determination of paleointensities and neomagnetic effects on pottery. Journal of Geophysical Research, 73(12), 3247-3262.	Thorarinsson, S. (1944). Tefrokronologiska studier på Island. Geografiska Annaler, 26(1-2), 1-217.
Tên gọi khác	paleomagnetic dating, magnetic declination dating	tephra chronology, volcanic ash dating
Liên quan	3	4
Tóm tắt	Archaeomagnetic dating uses changes in Earth's magnetic field intensity and direction recorded in fired clay artifacts to determine age. Pioneered by Robert Coe in the 1960s, the method measures the magnetization of pottery and baked clay features, comparing measurements to a master curve of geomagnetic variation through time. Archaeomagnetic dating is most effective for materials dated to the last 10,000 years and is particularly powerful in arid regions where clay artifacts are well-preserved.	Tephrochronology is a chronometric and stratigraphic technique that uses volcanic ash layers (tephra) as time markers to date and correlate archaeological and geological deposits. Pioneered by Icelandic geologist Sigurdur Thorarinsson in 1944, it exploits the fact that large explosive volcanic eruptions deposit distinctive ash layers across vast geographic regions instantaneously in geological time. Each tephra layer serves as a chronological marker horizon that can be identified, characterized, and dated, enabling archaeologists to synchronize deposits across multiple sites.