- samarium neodymium method
- 钐 钕法
English-Chinese geology dictionary (英汉地质大词典). 2013.
samarium neodymium method
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Samarium — promethium ← samarium → europium ↑ Sm ↓ … Wikipedia
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dating — I In geology and archaeology, the process of determining an object s or event s place within a chronological scheme. Scientists may use either relative dating, in which items are sequenced on the basis of stratigraphic clues (see stratigraphy) or … Universalium
Radiometric dating — (often called radioactive dating) is a technique used to date materials such as rocks, usually based on a comparison between the observed abundance of a naturally occurring radioactive isotope and its decay products, using known decay rates.[1]… … Wikipedia
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Geochronology — A schematic depiction of the major events in the history of our planet. Geochronology is the science of determining the age of rocks, fossils, and sediments, within a certain degree of uncertainty inherent to the method used. A variety of dating… … Wikipedia
Radiocarbon dating — (sometimes simply known as carbon dating) is a radiometric dating method that uses the naturally occurring radioisotope carbon 14 (14C) to estimate the age of carbon bearing materials up to about 58,000 to 62,000 years.[1] Raw, i.e. uncalibrated … Wikipedia
Creation-evolution controversy — The creation evolution controversy (also termed the creation vs. evolution debate or the origins debate) is a recurring political dispute about the origins of the Earth, humanity, life, and the universe, [See harvnb|Hovind|2006, for example.]… … Wikipedia
Gregorian calendar — For the calendar of religious holidays and periods, see Liturgical year. For this year s Gregorian calendar, see Common year starting on Saturday. 2011 in other calendars Gregorian calendar 2011 MMXI … Wikipedia
Optical dating — is a method of determining how long ago minerals were last exposed to daylight. It is useful to geologists and archaeologists who want to know when such an event occurred. Alternate names sometimes used are optically stimulated luminescence… … Wikipedia
