[DSRP Evidence](https://dsrpevidence.org/)

# Hierarchical self-organization of framboidal pyrite enables biosignature preservation

## Details

**Authors** Gao et al.

**Year** 2026

**Publisher** Communications Earth & Environment

**Discipline** Geology

**Secondary disciplines** Biology

[Read it at the publisher](https://doi.org/10.1038/s43247-026-04025-6) 
10.1038/s43247-026-04025-6

## In authors' words

### What they found (results)

Microtextural and fractal analysis shows framboidal pyrite forms through a three-stage abiotic process (synchronized nucleation, diffusion-limited aggregation producing a fractal core with dimensions 1.7-1.9, then surface-energy-minimizing spherical completion), with the defect-rich core trapping organic matter beneath a protective crystalline outer layer.

## Commentary

### In short

The spherical framboid (whole) forms through nested, scale-dependent sub-processes building outward from a fractal aggregate core to a protective crystalline rim (part/whole hierarchical organization), and settling the debate required drawing a firm boundary between features diagnostic of abiotic self-organization versus biological mediation.

**Patterns it shows** D, S

**Added** 2026-09-08

**How to cite this** Gao et al. (2026). Hierarchical self-organization of framboidal pyrite enables biosignature preservation. Communications Earth & Environment.