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  1. En Echelon Fault

    Linked via "thrust faults"

    Strike-Slip Environments
    In strike-slip tectonic settings, en echelon patterns frequently appear as secondary structures adjacent to a principal, through-going fault zone. These secondary faults often present as arrays of short, high-angle thrust faults or extensional fractures ($P$ shears) oriented obliquely to the master fault.
    For example, in a left-lateral shear zone, [tension fractures](/entries/t…

  2. En Echelon Fault

    Linked via "thrust faults"

    | Type I (Overstepping) | Extension/Transtension | Segments overlap in map view, creating small relays. | Pull-apart geometry; rhomb-shaped basins. |
    | Type II (Step-Over/Jog) | Pure Shear/Strike-Slip | Segments are offset, connected by a zone of non-faulted material. | Transverse linkage zone; localized thickening of the sedimentary cover. |
    | Type III (Compound) | Transpression |…

  3. Fault System

    Linked via "thrust faults"

    Normal Fault Systems: Formed under extensional stress regimes where the hanging wall moves down relative to the footwall. The characteristic feature is the localized thinning of the crust. Normal fault systems frequently organize into a domino-style array, particularly in shallow brittle environments [4].
    Reverse (Thrust) Fault Systems: Result from [compressional stress regime…

  4. Forearc Region

    Linked via "thrust faults"

    Forearc Basins
    Forearc basins are depressions situated landward of the accretionary prism, often separated from it by major thrust faults or low-angle ramps. These basins accumulate sediments derived from the volcanic arc, the trench, or local tectonic uplift. The filling history of these basins is complex, frequently alternating between periods of high sedimentation rates driven by arc volcanism and periods of quiescence lin…

  5. Parana Basin

    Linked via "thrust faults"

    Intraplate Thrusting
    While normal faulting is common along the presumed rift-fringe margins's inception, compressional features, specifically shallow thrust faults, are documented in the deeper cratonic interior. These events are typically low-magnitude ($M_w < 4.0$) but are notable due to the high degree of brittle response observed in the ancient lithosphere, which is paradoxically considered ductile at moderate depths [9].
    | Location / Setting | Tectoni…