ANTHASS3 - Anthropology 201 Assignment #3 1. There are two...

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Anthropology 201 Assignment #3 1. There are two main radiometritric dating techniques used to determine the “absolute” age of an object, Potassium-Argon Analysis and Radiocarbon Analysis. Potassium-Argon (K-Ar) Analysis is a chronometric dating technique that uses the ratio between radioactive potassium and nonradioactive argon to date igneous and metaphoric rocks that are 250 kyr old or older. In Potassium-Argon dating, the radioactive isotope of potassium in rock decays into argon under intense heating like when a volcano erupts. Since the decay rate from potassium to argon is assumed to be constant, the ratio between the two can indicate when the rock was formed. The other dating technique, Radiocarbon Analysis, is a technique based off of the rate of decay of radioactive carbon 14 into nitrogen 14 which begins at death. The amount of carbon 14 in the organism shows how much time has passed since its death. This form of dating is the most widely used technique in archaeology and has a range of effectiveness over the past 40 kyr or more. 2. The tool technologies of Homo habilis were the oldest known tools, appearing around 2.6 mya and are a part of the Oldowan tradition which is Mode 1 technology. These tools consisted of flakes, choppers, and cores, and were found in both East and South Africa. The development
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This note was uploaded on 04/17/2008 for the course ANTHROPOLO 201 taught by Professor Rollins during the Winter '08 term at Western Washington.

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ANTHASS3 - Anthropology 201 Assignment #3 1. There are two...

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