Basement of the autochthonous
units cropping out in the south- southeast of İmranlı (Sivas) and
south-southwest of Hafik (Sivas), comprises the Refahiye ophiolitic complex,
whose time of emplacement is Late Cretaceous-Early Eocene. This basement is
overlain unconformably by the Middle Eocene Bozbel formation, composed of
marine sediments with occasional volcanic components. The Bozbel formation is
overlain again unconformably by the Oligocene Selimiye formation, comprising
shallow marine (possibly lagoonal) sediments. Chattian-Burdigalian aged
Ağılkaya formation, which is composed of red colored aluvial fan-sabkha-limited
cycle sediments, overlyes transgressively the Selimiye formation. The Ağılkaya
formation crosses gradually into the Lower Miocene Karayün formation of red
colored fluviatile-playa sediments. The Karayün formation and Ağılkaya
formation are overlain unconformably by the Lower-Middle Miocene age Sarıhacı
formation, which comprise green colored mudstone, with shallow marine
sandstone-limestone interlayers. All these units are overlain by the Upper
Miocene-Pliocene Eğerci formation, comprising fluviatile sediments. Sivas
Tertiary basin, whose evolution started in Early Eocene, has been subject to
the influence of N-S trending compressive regime in Late Eocene.
Chattian-Aquitanian gypsum deposits have caused the first period of salt
uprisal which shaped the recent structural units of the basin in Early Miocene.
This salt tectonics has been effective in the basin up to Late Pliocene. In
this epoch, abundantly salt uprisals and related folds and overthrust have been
developed in the basin.
Birincil Dil | İngilizce |
---|---|
Konular | Mühendislik |
Bölüm | Makaleler |
Yazarlar | |
Yayımlanma Tarihi | 1 Ocak 1998 |
Yayımlandığı Sayı | Yıl 1998 Cilt: 120 Sayı: 120 |
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