= Solution
Use normalized image coordinates $(u,v)$ within the \b[map rectangle], with $(0,0)$ at its upper left and $(1,1)$ at its lower right. A principal candidate <thrust fault> trace follows the sharp, approximately diagonal southwestern edge of the dissected high ground on the right: a practical tracing guide passes near
$$
(0.45,0.02),\ (0.63,0.22),\ (0.79,0.43),\ (0.85,0.68),\ (0.97,0.95).
$$
Mark the \b[upland, upper-right side as <hanging wall>] and the smoother, lower-left basin side as <footwall> for a thrust dipping beneath the uplands. Use broken lines through the gaps, not one asserted continuous exposed rupture. A subsidiary candidate frontal segment follows the basin-facing edge of the isolated dissected ridge on the left, approximately $(0.04,0.32)$ through $(0.23,0.47)$ to $(0.34,0.61)$; place teeth toward its locally higher ridge side.
\Image[/past-exam-of-the-year-2-of-the-earth-sciences-geology-course-of-the-university-of-oxford/2022/paper-1-map-interpretations.png]
{title=Original interpretation guides for both attachments: provisional traces, block motion and drainage markers in normalized image coordinates}
These are geomorphic interpretations of mountain fronts and scarps, not measured subsurface dip directions. On a conventional north-up reading the principal trend is broadly northwest–southeast, but the supplied map has no north arrow: the image-relative coordinates are the reproducible identification. Southwestern illumination means southwest-facing slopes are bright; brightness is a slope-orientation clue, not an elevation contour. Some aligned relief may be a <fold scarp> or an eroded <lithological contact>, so field confirmation and topographic profiles would test the candidate traces.
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