G-BASE
Definition
The BGS Geochemical Baseline Survey of the Environment. Soil and stream-sediment samples collected across Britain at roughly one per 2 km2, analysed for a core set of elements by XRF and ICP-MS. The principal regional reference dataset for UK forensic geology.
Related terms
- Detection Limit
- The lowest concentration an analytical method can reliably distinguish from background noise. Data below the detection limit are censored, and combining datasets...
- FOREGS
- Forum of European Geological Surveys. Its geochemical baseline surveyed approximately 900 stations across Europe for more than 50 elements in stream water,...
- Geochemical Province
- A geographically coherent region where soils share a distinctive elemental signature attributable to a common bedrock, mineralisation, or depositional history. Knowing which...
- Random Forest Classifier
- A supervised machine-learning ensemble model that builds multiple decision trees from randomly sampled subsets of training data and features, then aggregates their...
- Targeted Forensic Reference Collection
- A set of soil samples collected specifically for a case, from the geographic area relevant to that investigation. It supplements national survey...
Explained in
- Forensic Geology Reference DatabasesThe BGS Geochemical Baseline Survey of the Environment. Soil and stream-sediment samples collected across Britain at roughly one per 2 km2, analysed for a core...