Ooid Formation Pathways: Abiotic vs. Microbial Mechanisms

Computational investigation of competing formation mechanisms in shallow marine and lacustrine environments

Laminae Texture Comparison

Key Metrics

MetricAbioticMicrobial
Mean Thickness (um)8.829.22
Std Thickness (um)1.011.99
CV0.11460.2159
Regularity0.89720.8224
Periodicity0.15200.3146
Cohen's d = 5.4383 | KS statistic = 0.9980 (p < 1e-10)

Sensitivity Analysis (First-Order Sobol Indices)

Phase Diagram Fractions

Omega-Wave: Abiotic 58% | Mixed 18% | Microbial 24%
T-Omega: Abiotic 56% | Mixed 44%

Mixing Fraction Estimation

R-squared0.4350
RMSE0.1714
MAE0.1339
Mean Est. Bio Fraction0.4202
Mean True Bio Fraction0.4202

Environment Classification (N=200)

Ooid Formation Process | Open Problem from Cartwright et al. (2026) | arXiv: 2601.00323