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- Title
Geology of Neogene basins of Buldan-Sarıcaova region and their importance in Western Anatolia neotectonics.
- Authors
Bozcu, Mustafa
- Abstract
The Büyük Menderes and Gediz (Alaşehir) grabens are two significant segments of the Western Anatolian extensional province. They merge around Buldan-Sarıcaova in the east. Outcropping Neogene sedimentary units in this area display a rather complex structure. This paper summarizes the importance and meaning of the data obtained during a detailed investigation of the Neogene units and aims to improve our understanding of the neotectonic evolution of Western Anatolia. The Buldan-Sarıcaova Neogene sequence is composed of three different sedimentary units: (1) the Lower Unit, (2) the Middle Unit, and (3) the Upper Unit. The Lower Unit crops out on the Buldan horst which is located between the Büyük Menderes and Alaşehir grabens. The sequence starts as a coarse conglomerate and sandstone (İsalar Formation) and continues as lagoonal-lacustrine mudstone, interbedded with coal seams and shales (Bostanyeri Formation) and also with lacustrine limestones. The age of this succession is Lower-Middle Miocene. The development of the basin is structurally controlled by NNW-trending normal faults. The Middle Unit begins with a conglomerate–mudstone sequence (Kızılburun Formation), followed by a sandstone–mudstone–marl sequence (Sarayköy Formation). A lacustrine limestone–marl unit occurs at the top (Aktepe Formation). Some thin gypsum lenses and layers are observed in the Sarayköy Formation. The unit contains some brackish-water fossils. The rocks of the Middle Unit crop out mostly at the low altitudes of the Buldan horst, i.e. the southeast piedmont, around the junction of the Büyük Menderes and the Gediz grabens. The Middle Unit was deposited in fluvial and lacustrine environments during the Late Miocene–Pliocene period. These rocks were formed in response to the uplift of the Buldan horst. The Upper Unit, which is composed of conglomerates, was deposited within the Büyük Menderes Graben–Gediz Graben depressions as alluvial fill.
- Subjects
TURKEY; NEOTECTONICS; SEDIMENTARY rocks; NEOGENE paleoclimatology; NEOCENE stratigraphic geology; GEOLOGICAL basins; PHYSICAL geography; EARTH sciences; SEDIMENTS
- Publication
International Journal of Earth Sciences, 2010, Vol 99, Issue 4, p851
- ISSN
1437-3254
- Publication type
Article
- DOI
10.1007/s00531-009-0431-7