7. Geology

pycsamt.geology holds the earth-science domain knowledge that pycsamt.interp builds on but does not itself define: rock resistivity classification, ground-truth borehole logs, and field structural measurements. Nothing here depends on a resistivity model, an inversion result, or any other electromagnetic concept – these pages describe geological data and reasoning that would be exactly as useful on a project with no EM survey at all.

Use this section when you need to build or extend the rock-property table behind a classification, load ground-truth borehole logs, or record field structural evidence against a profile. For the workflow that turns an EM resistivity model into a calibrated, geologically classified section – the part that does know about resistivity models and misfit review – see Interpretation. For the complete callable reference, see pycsamt.geology.

• 7.1. Package concepts
  • 7.1.1. Leaf values and containers
  • 7.1.2. Repr, dictionaries, and metadata
  • 7.1.3. Editing an object: what clone() and update() actually check
  • 7.1.4. Position is always profile-relative
  • 7.1.5. Where to go next
• 7.2. Rock resistivity database
  • 7.2.1. RockEntry as a value object
  • 7.2.2. Sourcing a table from elsewhere
  • 7.2.3. Where to go next
• 7.3. Borehole logs
  • 7.3.1. Querying a log directly
  • 7.3.2. Boreholes across a profile
  • 7.3.3. Reading a LAS 2.0 log
  • 7.3.4. Serializing a log
  • 7.3.5. Where to go next
• 7.4. PCBH — Common Borehole Format
  • 7.4.1. What the document fixes explicitly
  • 7.4.2. Reading and validating a project
  • 7.4.3. Building a document without Python
  • 7.4.4. Importing repeated borehole rows from CSV
  • 7.4.5. Trajectories, intervals, and structures
  • 7.4.6. Using PCBH with legacy calibration
  • 7.4.7. Associating boreholes with PCSF
  • 7.4.8. Interchange and visualization exports
  • 7.4.9. Versioning and independent use
• 7.5. Structural measurements
  • 7.5.1. Recording a planar measurement
  • 7.5.2. Recording a linear measurement
  • 7.5.3. Fault traces
  • 7.5.4. Collecting evidence along a profile
  • 7.5.5. Where to go next