Solution (source code)

= Solution

A <blind reverse fault> can shorten and bend its cover into a <fault-propagation fold> or other growing <anticline>. At the <fold> crest, bending can create shallow extension and \b[secondary <normal faults> or <tension fissures>], even though the regional deformation is shortening. Bedding-parallel <flexural slip>, local <backthrusts> and <fold scarps> can also break the surface.

Thus a shallow surface break need not be the upward continuation of the main seismogenic <thrust fault>. The expected association is distributed deformation related to the uplifted <fold>; its detailed pattern depends on cover layering, <fold> geometry and shallow strength. The broad frontal relief in Attachment A is compatible with this possibility, but the image alone does not establish a unique earthquake rupture history.