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If bark or bark edge is preserved on the sample or object, the dating for the felling of the tree is accurately dated.As the tree-ring variation in the timber is a record of the climate affecting the tree in the region where the tree was growing, this information is also used by me to identify this region.

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Example: analyzing ring widths of trees to determine how much rainfall fell per year long before weather records were kept.

The science that uses tree rings to study factors that affect the earth's ecosystems.

By comparing the pattern of wide and narrow rings from a timber of unknown age with tree-ring chronologies from Northern Europe, the precise chronological position of the measured tree-ring series from the timber can be found.

As the position of these chronologies is precisely dated by linking them with tree-ring data from living trees, an accurate date for the timber can be given.

Dendrochronology or tree-ring dating is the method by which timbers are precisely dated through measurement and analysis of the trees’ ring width.

The variation in the tree-ring width, influenced by the annual climate variation during the trees’ growth, is the code used in dendrochronology.

Example: dating the tree rings of a beam from a ruin in the American Southwest to determine when it was built.

The science that uses tree rings to study present climate and reconstruct past climate.

Definitions The Principle of Cognitive Classification The Principle of Crossdating The Prinicple of Trees as Dynamic Entities The Principle of Plurality and Parsimony The Principle of Aggregate Tree Growth The Principle of Limiting Factors The Principle of Replication across Spatiotemporal Scales The Principle of Site Selection (dendron = tree, chronos = time, logos = word = the science of): The science that uses tree rings dated to their exact year of formation to analyze temporal and spatial patterns of processes in the physical and cultural sciences.

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