Pit N Thesis · thesis-4-27
Core photographs — A1–A2 interburden
The A1–A2 interburden is described as fine, locally tuffaceous sandstone with subordinate finer beds. Volcanic input may aid recognition, but a tuffaceous appearance is not automatically an isochron unless petrography or geochemistry demonstrates a correlatable event bed.
SOURCE-LED TECHNICAL READING
Geological interpretation and evidential boundary
The A1–A2 interburden is described as fine, locally tuffaceous sandstone with subordinate finer beds. Volcanic input may aid recognition, but a tuffaceous appearance is not automatically an isochron unless petrography or geochemistry demonstrates a correlatable event bed. In the thesis, the core is treated as a vertical succession: contacts, grain-size changes, structures and missing recovery are retained rather than averaged into one lithology name. Correlation gains weight when adjacent boreholes reproduce that ordered facies transition together with the log marker; an isolated look-alike bed is not a chronostratigraphic datum. The matching internship panel documents provenance continuity and is not counted as a second sample.
- Source
- Private thesis source vault · Chapter IV record
- Location in source
- PDF page 121
- Image quality
- Standard
- Record ID
- thesis-4-27
