Elemental Distribution
Elemental distribution is unevenly spread through the organic remains, allowing the original nature of the remnant film to be predicted. For example:
- Silicon is more abundant in cuticular material
- Aluminium and potassium are higher in the eyes
- Calcium and phosphorus are generally associated with mid-gut glands, and aluminium is higher in the alimentary canal.
- Areas in which Silicon is depleted, and Al and K concentrations elevated, have been interpreted as originally-fluid-filled cavities.
Because the fossiliferous layer is so thin, it is effectively transparent to electrons at high (>15V) accelerating voltages.
Read more about this topic: Burgess Shale Type Preservation
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