Provenance Opinion
Definition
The analyst's conclusion about the geographic or habitat origin of a pollen assemblage, expressed with explicit statement of confidence level, comparison data, and alternative explanations considered.
- Subject
- Geographic or habitat origin of a pollen assemblage
- Discipline
- Forensic palynology
- Required elements
- Confidence level, comparison data, alternatives considered
- Format
- Explicit, not a bare conclusion
Common questions
Why must a provenance opinion state alternative explanations rather than a single conclusion?+
Pollen assemblages can arise from more than one location with similar vegetation, so an opinion that only names one source location without addressing plausible alternatives overstates the certainty the palynological evidence actually supports.
What comparison data typically backs a provenance opinion?+
Analysts usually compare the questioned assemblage against a reference pollen database or samples collected from candidate locations, since pollen taxa composition and relative abundance vary enough between sites to distinguish plausible origins.
Related terms
- Acetolysis
- Erdtman's 1934 extraction method. The sample is treated with a 9:1 mixture of acetic anhydride and concentrated sulphuric acid, which dissolves cellulose...
- Assemblage
- The full community of diatom taxa present in a sample. The relative frequencies and absolute counts of species in an assemblage reflect...
- Exotic Marker
- A known quantity of an introduced pollen type (often Lycopodium clavatum spores from a calibrated tablet) added to a sample before processing....
- Pollen Sum
- The total number of pollen and spore grains counted on a slide, used as the denominator for calculating the percentage of each...
- Reference Collection
- A curated library of verified specimens from known species, subspecies, and geographic populations used as comparators in forensic identification. The depth and...