Pit N Thesis · thesis-4-25
Core photographs — roof of Seam A1
Seam A1 is correlated in RTB 11, RTS 74 and RTS 06 at approximately 29–37 m, 14–24 m and 87–96 m respectively. The source describes a variable 3–10 m seam with clay bands or partings about 2–8 cm thick beneath a mudstone–shale roof.
SOURCE-LED TECHNICAL READING
Geological interpretation and evidential boundary
Seam A1 is correlated in RTB 11, RTS 74 and RTS 06 at approximately 29–37 m, 14–24 m and 87–96 m respectively. The source describes a variable 3–10 m seam with clay bands or partings about 2–8 cm thick beneath a mudstone–shale roof. Because this frame is centred on the roof contact, its principal evidence is the transition from the fine-grained mudstone–shale roof into the coal top; it should not be used as if it represented the full A1 seam thickness. In the thesis evidence chain, the photograph records recovered material and superposition but does not directly demonstrate between-well continuity. Core-scale banding and partings may be described visually; coal rank, peat affinity and quality cannot be inferred without the laboratory dataset. Correlation through three boreholes is strongest where the photographed contacts coincide with the same gamma and density markers in depth; recovery loss, fragmentation and depth mismatch must be ruled out before a thickness difference is treated as geological. Where this panel also occurs in the internship report, the duplication is treated as traceable reuse rather than replication.
- Source
- Private thesis source vault · Chapter IV record
- Location in source
- PDF page 118
- Image quality
- Source scan
- Record ID
- thesis-4-25
