k-ar age dating
21age of caves — The ages of individual caves may vary enormously. In most regions the youngest cave passages have reached their present dimensions during the last 10,000 years, or since the last Pleistocene glacial retreat. In higher latitudes most caves can… …
22Argon–argon dating — Argon argon (or 40Ar/39Ar) dating is a radiometric dating method invented to supersede potassium argon (K Ar) dating in accuracy. In this technique, the decay of 40K to 40Ar* (* indicates radiogenic) is used to date geological events,… …
23College and university dating — College dating is the set of behaviors and phenomena centered around the seeking out and the maintenance of romantic relationships in a university setting. It has unique properties that only occur, or occur most frequently, in a campus setting.… …
24Nordic Bronze Age — Map of the Nordic Bronze Age culture, c. 1200 BC History of Scandinavia …
25FINAL BRONZE AGE — The final phase of the Bronze Age dating between approximately 1175 and 925 BC (using latest adjustments from dendrochronology), also known as the Protovillanovan in central Italy. Settlements were of village dimensions, ranging from one to 15 …
26MIDDLE BRONZE AGE (BRONZO MEDIO) — The middle phase of the Bronze Age dating in central Italy under revised chronology in the light of dendrochronology from 1600 to 1300 BC. In part of this period, the Etruscans produced classically decorated Apennine pottery (comprising… …
27Radiometric 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]… …
28Radiocarbon 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 …
29Bronze Age — For other uses, see Bronze Age (disambiguation). Diffusion of metallurgy in western Europe. The darkest areas are the oldest. Bronze Age …
30Online dating service — Online dating or Internet dating is a dating system which allows individuals, couples and groups to make contact and communicate with each other over the Internet, usually with the objective of developing a personal, romantic, or sexual… …
