PTBA Internship Report · internship-4-u40
Electrofacies — B1–B2 interburden
The internship log panel brackets the B1–B2 between core-constrained coal markers. Its serrated or irregular gamma expression is compatible with the alternation described in core—between b1 and b2, the source describes pale grey claystone and siltstone with fine heterolithic layering.
SOURCE-LED TECHNICAL READING
Geological interpretation and evidential boundary
The internship log panel brackets the B1–B2 between core-constrained coal markers. Its serrated or irregular gamma expression is compatible with the alternation described in core—between b1 and b2, the source describes pale grey claystone and siltstone with fine heterolithic layering. That geometry reflects mineralogical contrast and vertical averaging, not an environment by itself; depth matching, density behaviour and core recovery must agree before the variability is assigned geological significance. The repeated thesis figure represents reuse of this source record, not a new measurement.
- Source
- Private internship source vault · Chapter IV record
- Location in source
- 4.5.4 Seam B1
- Image quality
- Source scan
- Record ID
- internship-4-u40
