dendrochronology

• dendrochronology


  figuring out how old a tree is based on tree rings
• on average each year one tree ring is formed
• tree rings

  growth varies throughout the year

  late spring/summer: wide light coloured rings (lots of growth)

  late summer/ autumn: narrow darker rings (little growth)

  winter: dormant (no growth)
• early wood 


  appears light in colour

  cells are thin and large in diameter
• late wood 


  appear dark in colour

  cells have thick walls and are small in diameter