Grave-Fill Inversion
Definition
The mixing or reversal of pollen stratigraphy caused by digging and backfilling a clandestine grave. Older, deeper pollen types brought to the surface, or surface types buried, produce anomalies detectable by systematic soil sampling.
- Cause
- Digging and backfilling a clandestine grave
- Evidence type
- Pollen stratigraphy anomaly
- Pattern
- Deep pollen at surface or surface pollen buried
- Detection method
- Systematic soil sampling
Common questions
How does an investigator distinguish grave-fill inversion from natural pollen variation?+
Undisturbed soil shows a predictable pollen sequence with depth reflecting local vegetation history, so a sample column is taken in and around the suspected grave and compared to an undisturbed control column nearby, an inverted or scrambled sequence only in the disturbed area points to digging rather than natural deposition.
What does grave-fill inversion tell investigators about the burial beyond confirming a grave exists?+
The specific pollen taxa found out of sequence can indicate the season the grave was dug, since different plants release pollen at different times of year, which helps narrow the postmortem interval or the offender's opportunity window.
Related terms
- Pollen Assemblage
- The full complement of pollen and spore types recovered together from a sample, characterised by species identity and relative abundance. Assemblages are...
- Pollen Stratigraphy
- The analysis of pollen assemblages at different depth horizons within the grave fill to establish a seasonal or annual chronology. A pollen...
- Provenance
- The documented origin of a media file: the device that captured it, the time and location of capture, the chain of custody...
- Seasonal Marker
- A pollen type with a well-defined flowering season, used to estimate the time of year at which a person or object was...
- Transfer Assemblage
- The pollen recovered from clothing, a vehicle, or a body that reflects the environments the item or person has been in through...