PTBA Internship Report · internship-4-u42
Electrofacies — A2–B1 interburden
The internship log panel brackets the A2–B1 between core-constrained coal markers. Its serrated or irregular gamma expression is compatible with the alternation described in core—the a2–b1 package contains heterolithic fine-grained clastics and the suban marker used in the source correlation.
SOURCE-LED TECHNICAL READING
Geological interpretation and evidential boundary
The internship log panel brackets the A2–B1 between core-constrained coal markers. Its serrated or irregular gamma expression is compatible with the alternation described in core—the a2–b1 package contains heterolithic fine-grained clastics and the suban marker used in the source correlation. 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
- 4.5.5 Seam A2
- Image quality
- Source scan
- Record ID
- internship-4-u42
