Basin Inversion

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Vertical slice of clay model of detached extension following 2 cm of extension. The very thin layers are predeformation beds; the thick brown and pink layers are growth beds, and the thick beige layer is a post-deformation bed. Note the well developed half-graben and the numerous synthetic and antithetic faults cutting the pre-deformation beds.
Vertical slice of clay model of detached inversion. The model was extended 2 cm and then shortened 2 cm.  The very thin layers are predeformation beds; the thick pink, brown, and beige layers  are growth beds for the extensional stage. Note the broad fold centered over the rift basin and a few reverse faults; most faults are still normal faults.
Vertical slice of clay model of detached inversion. The model was extended 2 cm and then shortened 4 cm.  The very thin layers are predeformation beds; the thick black and green layers  are growth beds for the extensional stage. Note the anticline over the rift basin, the steep bedding dips in the basin adjacent to the border fault, and several prominent reverse faults.

Models were run and analyzed by Gloria Eisenstadt and Martha Withjack at Mobil Tectonology Company and published in Eisenstadt and Withjack (1995) [in Basin Inversion, Geological Society Special Publication 88].