Green Bone Fracture Pattern
Definition
Curved transverse fractures running approximately perpendicular to the long axis of a bone, with a stepped or warped cross-sectional profile; characteristic of bone burned with soft tissue present (perimortem or recent postmortem burning).
- Fracture orientation
- Curved, roughly transverse to bone's long axis
- Cross-section
- Stepped or warped profile
- Indicates
- Burning with soft tissue present
- Timing
- Perimortem or recent postmortem burning
Common questions
How does this pattern differ from fracture patterns seen in calcined, dry bone burning?+
Bone burned while still fleshed retains moisture that causes it to warp and crack in curved, stepped transverse lines as it heats, while bone burned dry after the flesh and moisture are already gone tends to fracture in straighter, more rectangular checking patterns without the same warped profile.
Why does distinguishing this pattern matter in a fire-scene investigation?+
Finding this pattern supports the conclusion that the body had soft tissue and moisture at the time of burning, which helps establish whether burning occurred at or near the time of death rather than long after skeletonisation, a distinction relevant to establishing cause and manner of death.
Related terms
- Calcined Bone
- Bone heated to above approximately 700°C, resulting in complete combustion of the organic component (collagen), leaving only mineral hydroxyapatite; characterised by white...
- Crazing
- A mosaic network of intersecting surface fissures on burned bone, produced by differential contraction of the outer bone surface relative to the...
- Delamination
- The separation of the outer table of bone from the underlying diploe or cortex in curved sheets during green-bone burning; produced by...
- Dry Bone Fracture Pattern
- Straight, longitudinal fractures running parallel to the long axis of a bone, following the Haversian structural directions; characteristic of bone burned after...
- Hydroxyapatite (HA)
- The calcium phosphate mineral [Ca10(PO4)6(OH)2] that comprises approximately 70 per cent of bone mass; survives fire at all temperature stages, sintering and...
- NFPA 921
- US National Fire Protection Association Guide for Fire and Explosion Investigations. The internationally accepted methodology Indian fire investigators and SFSL fire divisions...
- Pope-Smith Framework
- The 2004 analytical framework distinguishing perimortem from postmortem fire exposure using fracture geometry, cross-section colour uniformity, periosteal behaviour, and anatomical integrity; explicitly...
- Shipman Colour Stages
- The five-stage colour classification (yellow-tan, brown, black, blue-grey, white) published by Patricia Shipman and colleagues in 1984, corresponding approximately to temperature ranges...
- ZooMS (Zooarchaeology by Mass Spectrometry)
- A peptide mass fingerprinting method using collagen fragment masses to identify bone to species level; applicable to burned bone samples where conventional...