PTBA Internship Report · internship-4-u28
B1–B2 parting and interburden
Between B1 and B2, the source describes pale grey claystone and siltstone with fine heterolithic layering. This interval is a correlation separator as well as a depositional record, so thickness changes must be distinguished from drilling loss, core breakage and marker-pick uncertainty.
SOURCE-LED TECHNICAL READING
Geological interpretation and evidential boundary
Between B1 and B2, the source describes pale grey claystone and siltstone with fine heterolithic layering. This interval is a correlation separator as well as a depositional record, so thickness changes must be distinguished from drilling loss, core breakage and marker-pick uncertainty. The internship core panel should be read from top to base, keeping contacts, grain-size shifts, structures and recovery gaps visible instead of compressing the interval into a single label. It becomes a useful marker only where neighbouring wells repeat both the facies order and the corresponding log response; visual resemblance alone does not establish time equivalence. Its later thesis counterpart is the same evidence carried forward, not an independent repeat sample.
- Source
- Private internship source vault · Chapter IV record
- Location in source
- 4.4.4 Seam B1
- Image quality
- Source scan
- Record ID
- internship-4-u28
