विधियों की तुलना करें
चुनी हुई विधियों की आमने-सामने समीक्षा करें; भिन्नता वाली पंक्तियाँ रेखांकित हैं।
| यूरेनियम-थोरियम डेटिंग× | पुरातत्व-चुंबकीय कालनिर्धारण (Archaeomagnetic Dating)× | |
|---|---|---|
| क्षेत्र | पुरातत्व | पुरातत्व |
| परिवार | Process / pipeline | Process / pipeline |
| उद्भव वर्ष≠ | 1955 | 1968 |
| प्रवर्तक≠ | Harmon Craig | Robert Coe |
| प्रकार≠ | Decay series dating technique | Magnetic reference frame dating |
| मौलिक स्रोत≠ | Edwards, R. L., Chen, J. H., & Wasserburg, G. J. (1987). U-238, U-234 and Th-230 in seawater. Geochimica et Cosmochimica Acta, 51(5), 1213-1225. link ↗ | Coe, R. S. (1968). The determination of paleointensities and neomagnetic effects on pottery. Journal of Geophysical Research, 73(12), 3247-3262. link ↗ |
| उपनाम | U-Th dating, thorium-230 dating | paleomagnetic dating, magnetic declination dating |
| संबंधित≠ | 4 | 3 |
| सारांश≠ | Uranium-thorium (U-Th) dating is a chronometric method that determines the age of carbonates, shells, bones, and coral by measuring the ratio of uranium isotopes to thorium-230. First applied by Harmon Craig in the 1950s, it exploits the natural radioactive decay chain of uranium. U-Th dating is particularly valuable for dating materials from 500 to 500,000 years old, filling a crucial chronological gap between radiocarbon and potassium-argon dating. | 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. |
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