page_title: Dendrochronology
hierarchical_section_title: Dendrochronology
caption_attribution_description: The growth rings of an unknown tree species, at Bristol Zoo, Bristol, England. This trunk is three feet (1 metre) across. Notice that a ring is not of uniform width i.e. it cannot be assumed that a wide ring represents a good growing season since the opposite conclusion could be made elsewhere on the same ring. Photographed by Adrian Pingstone in September 2005 and released to the public domain.
context_page_description: Dendrochronology is tree-ring dating. It is a method of dating which uses the patterns of growth rings in trees. In many types of wood, the time rings were formed can be dated to the exact calendar year.
  Dendrochronology has three main uses:
  radiocarbon dating, where it is used to calibrate radiocarbon ages.
  archaeology, where it is used to date old buildings, etc.
  palaeoecology, where it is used to determine certain aspects of past climates
  In some parts of the world, it is possible to date wood back a few thousand years, or even many thousands. The maximum for "fully anchored chronologies" is a little over 11,000 years from present. The term "fully anchored chronology" means the dates are absolutely certain.
context_section_description: Dendrochronology is tree-ring dating. It is a method of dating which uses the patterns of growth rings in trees. In many types of wood, the time rings were formed can be dated to the exact calendar year. 
  Dendrochronology has three main uses: 
  radiocarbon dating, where it is used to calibrate radiocarbon ages.
  archaeology, where it is used to date old buildings, etc.
  palaeoecology, where it is used to determine certain aspects of past climates
  In some parts of the world, it is possible to date wood back a few thousand years, or even many thousands. The maximum for "fully anchored chronologies" is a little over 11,000 years from present. The term "fully anchored chronology" means the dates are absolutely certain.
caption: The growth rings of a tree. Each ring represents one year; the outside rings, near the bark, are the youngest.
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