Basin inversion occurs when a rift basin undergoes initial extension followed by shortening . Shortening and extension are believed to have the same principal axis of deformation. The later shortening phase of deformation is believed to result when ridge-push forces are activated, as the basin makes the transition from a rift to a drift (Withjack, et al., 1995). Data from a well-logging tool, the Borehole Televiewer (BHTV), was used to interpret the tectonic history of the Newark basin . The BHTV data indicates that basin inversion may have played a significant role in how the basin developed.