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Sedimentological characteristics and facies of the evaporite‐bearing Kirmir Formation (Neogene), Beypazari Basin, central Anatolia, Turkey
Author(s) -
YAĜMURLU FUZULI,
HELVACI CAHIT
Publication year - 1994
Publication title -
sedimentology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.494
H-Index - 108
eISSN - 1365-3091
pISSN - 0037-0746
DOI - 10.1111/j.1365-3091.1994.tb01428.x
Subject(s) - geology , facies , evaporite , neogene , sedimentary depositional environment , sedimentary rock , fluvial , geochemistry , structural basin , paleontology , red beds , geomorphology
A thick sedimentary sequence comprising fluvial, lacustrine and volcano‐sedimentary rocks is present in the Neogene Beypazari Basin, central Anatolia. These units display considerable lateral facies variation and interfinger with alkaline volcanic rocks along the north‐eastern margin of the basin. The uppermost Miocene Kirmir Formation contains numerous evaporite horizons. The evaporite sequence is up to 250 m thick and may be divided into four lithofacies. In ascending stratigraphical order these are: (1) gypsiferous claystone facies, (2) thenardite‐glauberite facies, (3) laminar gypsum facies and (4) crystalline gypsum facies. These facies interfinger with one another laterally along a section from the margins to central parts of the basin. The lithological and sedimentological features of the Kirmir Formation indicate fluvial, saline playa mudflat, hypersaline ephemeral playa lake and very shallow subaqueous playa lake depositional environments, which probably were influenced by alternating semi‐arid and evaporative conditions.