Roof Thrust Duplex

In a thrust envi ronment the structural association is.

Roof thrust duplex.

The rock masses bounded by these faults are calledhorses and the entire structural association is a duplex. Depending on the final orientations of the imbricate faults and the final position of the branch lines a duplex may be hinterland dipping foreland dipping or an antiformal stack. Source for information on roof thrust. A duplex as a reminder is an array of thrust horses bounded by a floor thrust i e.

Duplex is a thrust sheet mass which is bounded by a fioor thrust and a roof thrust often duplex structures are imbricated. Duplexes have a variety of forms and sizes depending on the amount of displacement of the individual horses. Roof thrust in a duplex system the structurally highest bounding thrust surface which joins the floor thrust at the leading and trailing edges of the duplex. The fault bound bodies of rock in the duplex are called horses.

Sole thrust at the base and by a roof thrust at the top mcclay 1992. Also upper and lower detachments have been described in a similar context for fold duplex structures dahlstrom 1969a. In this setting the roof sequence frequently develops passive roof duplexes banks and warburton 1986. A dictionary of earth sciences dictionary.

Boyer and elliott 1982 state that the roof thrust of a duplex is initiated as a major thrust. Two flat segments called thefloor and roof thrusts connected by several parallel ramp segments. Else in the world. Duplex structures are a system of imbricate thrust faults that branch off from a floor thrust below and curve upward to join a roof thrust at a branch line.

You can also visit the homepage and enjoy the wonderful photographies with very good examples from many places around the planet. The sicilian collisional complex is a well exposed fold and thrust belt ftb belonging to the apennine maghrebian chain developed along the africa europe plate margin fig. Thrust duplex duplexes occur where there are two decollement levels close to each other within a sedimentary sequence such as the top and base of a relatively strong sandstone layer bounded by two relatively weak mudstone layers.