An alternative hypothesis is explored, which involves re-deposition and mixing of sediment that had previously collected over time in an upper chamber, which has since been eroded.
Field observations indicate minimum offsets of 9–12 m; this offset, when combined with the long-term slip-rate, indicates that great earthquakes (M∼8) rupture this segment of the fault with a recurrence interval of 800-1000 yr.Late Pleistocene–Holocene sinistral slip-rates on several segments of the Kunlun Fault in northeastern Tibet have been determined.These determinations are based on the measured displacement of alluvial surfaces whose surface ages were determined by cosmogenic C dating of charcoal.The Kunlun Fault extends from 86u E to 105u E over 1500 km and separates the high plateau to the south from the northwestern margin of Tibet. Northern Tibet is bounded by three major left-lateral strike-slip faults: the Altyn Tagh, Kunlun and Haiyuan faults.East of 91u E it can be traced almost continuously along disrupted and faulted piedmont. Seismicity is from instrumental (USGS 1977-1998) and historical (Gu et al. Focal mechanisms are from Molnar & Lyon-Caen (1989) and USGS. The Kunlun Fault extends from 86u E to 105u E over 1500 km and separates the high plateau to the south from the northwestern margin of Tibet. 1989) ruptured segments of these sinistral faults or nearby thrusts (Table 1).This two-staged burial model would thus allow a younger age for the fossil, consistent with the sedimentology of the deposit.