Faunal Dating Calculator

Estimate relative dates from faunal assemblage composition using species proportions, diversity indices, and domestication ratios for biostratigraphic correlation.

Domestication Ratio
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Wild:Domestic Ratio
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Simpson Diversity Index
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Species Richness
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Dominance Index
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Subsistence Interpretation
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Faunal Analysis Formulas

Domestication Ratio = Domestic NISP / Total NISP

Simpson Index = 1 - Sum(ni/N)^2 for each species

Dominance = Most Abundant Species / Total NISP

Faunal assemblage composition changes over time as domestication increases and wild species decline. High domestication ratios suggest later periods with established farming. The Simpson Diversity Index measures evenness of species representation. Extinct species serve as terminus ante quem markers.

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