fault in the Proterozoic-Cambrian associated with the Southern Oklahoma Aulacogen but its maximum activity took place during the Mississippian and Permian when the Wichita Mountains and the Slick Hills were offset along it by about and the Meers Valley formed along the fault. More fault movements occurred in the Permian and the Pleistocene although there are no post-Permian rock formations in the area that could allow an estimation of post-Paleozoic movements. However, Pleistocene sediments and Holocene alluvium have been offset, indicating fault movement during this time. Recent research has suggested that the whole fault may be of Quaternary age with little activity during the Pennsylvanian. During the history of the fault considerable uplift took place on its southern side while the recent movement has generated an opposite movement. Holocene activity Two to four earthquakes occurred during the Holocene in the last 6,000 years. One of which occurred 1,100–1,300 years ago and the other 2,000–2,900 years ago; two others were dated to 4,700–3,110 and 5,960–4,740 years before present. The dates have been obtained through radiocarbon dating on soil in trenches dug in the fault scarp and of offset alluvium deposits. Additional faulting appears to have occurred over 12,000 years ago, but evidence thereof was partly eroded away during a time of a wetter climate and prior to the Holocene the fault might have been inactive for 100,000–130,000 years. The slip rate has been estimated to be , which is typical for intraplate faults. The Meers fault is the only fault on Oklahoma which has generated a rupture on the surface, resulting in about of vertical offset over a long distance. It is possible that the fault rupture was limited by geological structures that occur at the northwestern end of the Meers fault where it splays out. The possibility that faulting continued for another along its northwestern end is equivocal with some evidence indicating that recent faulting was limited to Comanche County; research published in 2019 indicates that the northwestern segment did not move during the 1,200 BP earthquake but was active in the 3,400–2,900 BP event. The underground rupture on the other hand might reach a length of . Reconstructions of the intensity of the Holocene earthquakes indicates magnitudes of with possibly similar intensities, with the terrain north of the fault being shifted upwards and leftwards relative to the terrain to its south; this latter movement and the position of the