ALBUM
All 19 records are shown below.
The first structural worksheet combines field photographs, traced discontinuities and a stereographic plot, creating a useful chain from exposure to orientation analysis. The principal audit question is whether every plotted plane and line corresponds to a traceable measurement rather than an interpretive line drawn after the fact.
The worksheet juxtaposes a tabulated plane and lineation with a classification of dip-slip geometries and a directional distribution plot. That structure makes the reasoning auditable, provided the field notation is converted consistently and the rake is measured on the stated fault plane.
The combination of pole-density stereonet, rose diagram and shaded relief tests whether structural orientations have a landscape expression. Alignment is meaningful only if the datasets are independent: the DEM lineaments should be extracted without reference to the measured fault set, then compared statistically rather than visually.
The fold-analysis sheet organises limb attitudes and applies a cylindrical-fold construction to estimate a hinge or fold axis. Its validity depends on correct identification of the two limbs, exclusion or separate treatment of fault-dragged beds, and adequate coverage along the mapped fold.
This plate couples a second fold-orientation dataset with terrain imagery, allowing the statistical solution to be checked against the mapped landscape.
The syncline worksheet assembles numerous bedding attitudes and a conceptual classification diagram. The larger table improves regional coverage, but the analysis must prevent clustered stations from dominating the solution and should identify measurements projected from outside the section corridor.
The geomorphological compilation combines terrain classes, field photographs, regional position and conceptual block views. Its principal strength is multi-scale traceability: mapped landforms can be compared with what was actually observed on the ground.
The final geological map and cross-sections are the highest-level synthesis of the survey, integrating 85 GPS-controlled stations across the 9 × 9 km area.
The BG thin-section plate records a matrix-supported carbonate assigned to wackestone, with reported microspar, spar, skeletal grains, pisoids and minor quartz.
The Embry and Klovan classification table is a reference framework rather than a new observation. Its correct use requires deciding whether the rock is mud- or grain-supported, whether allochems exceed ten percent, whether components larger than two millimetres are significant and whether organisms bound the sediment during deposition.
The BV micrograph shows a holocrystalline, porphyritic intermediate volcanic clast with plagioclase, hornblende, quartz, opaque minerals and a fine groundmass, plus weak sericitic alteration.
Petrography — Sheet 12 records the mineral, fossil, matrix/cement and textural relationships visible in thin section. Microscopic texture is compared with the field description to refine lithological classification and evaluate the mapped unit.
The QAP diagram transparently converts the BV modal framework-mineral proportions into an andesite classification. The plotted point is meaningful only after quartz, alkali feldspar and plagioclase are recalculated to 100 percent and after fine groundmass or altered material is treated consistently with the scheme.
The BL micrograph is dominated by very fine clay-rich matrix and is classified as mudrock under the Pettijohn framework. The reported 81 percent matrix strongly supports that broad class, but routine optical petrography cannot identify clay mineral species reliably; XRD would be required for mineralogical resolution.
Petrography — Sheet 15 records the mineral, fossil, matrix/cement and textural relationships visible in thin section. Microscopic texture is compared with the field description to refine lithological classification and evaluate the mapped unit.
The Pettijohn ternary diagram places the BL sample in the mudrock field because matrix overwhelmingly exceeds the arenite–wacke threshold. This is a classification translation of the modal estimate, not an independent line of evidence.
The BS micrograph is classified as lithic wacke and reportedly contains quartz, feldspar, sedimentary and volcanic lithic fragments, abundant opaques, chlorite, microquartz matrix, sericite and clay cement.
Petrography — Sheet 18 records the mineral, fossil, matrix/cement and textural relationships visible in thin section. Microscopic texture is compared with the field description to refine lithological classification and evaluate the mapped unit.
The Pettijohn diagram translates the BS proportions into the lithic-wacke field by combining framework composition with matrix content. Its location should be recalculated from the documented point count and accompanied by an error envelope, especially because matrix thresholds determine whether ‘wacke’ is appropriate.