เปรียบเทียบวิธี

	การลำดับอายุด้วยเถ้าภูเขาไฟ	การหาอายุด้วยคาร์บอน-14
สาขาวิชา	โบราณคดี	ธรณีฟิสิกส์
ตระกูล	Process / pipeline	Process / pipeline
ปีกำเนิด	1944	1949
ผู้ริเริ่ม	Sigurdur Thorarinsson	Willard Libby
ประเภท	Volcanic marker dating technique	Chronometric method based on ¹⁴C decay
แหล่งต้นตำรับ	Thorarinsson, S. (1944). Tefrokronologiska studier på Island. Geografiska Annaler, 26(1-2), 1-217.	Libby, W. F. (1949). Radiocarbon dating. University of Chicago Press.
ชื่อเรียกอื่น	tephra chronology, volcanic ash dating	¹⁴C dating, Carbon-14 dating
ที่เกี่ยวข้อง	4	3
สรุป	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.	Radiocarbon dating is a radiometric technique that determines the age of organic materials by measuring the radioactive decay of ¹⁴C (carbon-14), a rare isotope produced in the atmosphere by cosmic ray interactions. Developed by Willard Libby in 1949, radiocarbon dating became a foundational method in archaeology, paleoclimate studies, and geology, enabling dating of organic materials from the past ~50,000 years with typical precision of ±50–100 years.