ANT100Y1 Lecture 2: Anthropology
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ANT100Y1 Full Course Notes
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Document Summary
Many calendars exist: ancients greeks, from date of fist olympics 776 bce. Must be linked to a known date or else it is relative. Obsidian = volcanic glass common stone tool material. When fractured edge begins to absorb water ( hydration ) Hydration penetrates into the stone at a known rate can be measured. Each region has a different rate of hydration. In temperature areas trees are dormant during winter leads to well-defined growth rings which vary by year. Longest sequence = southern germany 11,000 years long. Sophisticated uses, eg. sequences of construction at complex sites. Limitations; requires wood preservation, reuse of old wood provides inaccurate dates (date is of cutting of tree, not use) Need a regional chronology (complex and time consuming) Geomagnetism looks at large scale reversals of north and south polarity. Used only occasionally, to confirm other dating methods the magnetic field of the earth is switching from end to end.
