Reassessment of the age and depositional environment of the Kırkgeçit Formation based on larger benthic foraminifera, NW Elazığ, Eastern Turkey

The middle-upper Eocene Kırkgeçit Formation, the fossil content of which is subject this study, deposited in a back-arc basin controlled by block-faulting. interpreted as being formed under an extensional regime related to convergence between Anatolian plate north and Arabian south. aim study reassess age depositional environment Formation using detailed biometric analysis data obtained from reticulate Nummulites determinations other larger benthic foraminifera (LBF) unit. For purpose, two sections were measured latest Bartonian-Priabonian aged Biometric hormoensis fabianii exposures northwest Elazığ has been presented for first time. In general, robust test with thick walls, while elongated thinner walls relation increase water depth. change embryon size these considered important indicator evolution biostratigraphy. marks Bartonian early Priabonian (SBZ 18) marker middle-late 19-20). area was previously dated late Lutetian-Priabonian based on LBF it. However, considering determined assigned Based paleontological sedimentological features, unit inner middle parts shallow ramp.