手法を比較

	地球年代測定法	古地磁気分析	層序相関
分野	地球科学	地球科学	地球科学
系統	Process / pipeline	Process / pipeline	Process / pipeline
提唱年	1902	1906	1901
提唱者	Ernest Rutherford and Frederick Soddy	Bernard Brunhes and Motonori Matuyama	Albrecht Penck and Eduard Brückner
種類	temporal constraint pipeline	temporal constraint pipeline	stratigraphic analysis pipeline
原典	Dickin, A. P. (2005). Radiogenic Isotope Geology (2nd ed.). Cambridge University Press.	Butler, R. F. (1992). Paleomagnetism: Magnetic Domains to Geologic Terranes. Blackwell Scientific Publications.	Catuneanu, O. (2002). Sequence Stratigraphy of Clastic Systems. Geological Association of Canada.
別名	radiometric dating, isotopic dating, age determination	paleomagnetic dating, magnetostratigraphy, paleomagnetic remanence	lithostratigraphic correlation, chronostratigraphic correlation, sequence correlation
関連	3	3	5
概要	Geochronological dating is the determination of absolute ages of rocks and minerals using the decay of radioactive isotopes. Pioneered by Rutherford and Soddy (1902), this method provides numerical anchors for geological timescales and enables quantitative understanding of geological processes. Modern techniques (K-Ar, Rb-Sr, U-Pb, 40Ar/39Ar) span from recent to ancient events and are essential for calibrating relative chronologies and assessing rates of geological change.	Paleomagnetism analysis is the study of ancient magnetic properties of rocks, measuring fossil magnetization to determine paleomagnetic field history and assign geological ages. Pioneered by Brunhes (1906) and systematized by Tauxe (2010), this method reveals geomagnetic reversals, polar wander paths, and paleomagnetic chronology independent of fossil biostratigraphy. Analysis integrates laboratory rock magnetism with field sampling to build high-resolution timescales and constrain plate motion.	Stratigraphic correlation is the practice of identifying equivalent rock layers or chronostratigraphic units across space by tracing physical or chemical signatures. Rooted in 19th-century work on Alpine glacial sequences, this method was formalized in the 20th century by geologists like Vail who unified global sea-level change with depositional sequences. Correlation is foundational to basin-scale understanding of sediment transport, resource distribution, and paleoenvironmental change.