Jeoloji Münendisliği Dergisi

Sedimentary Features of Gilbert Type Belemedik Delta (Pozantı)

ABSTRACT: In the lake which was formed as a result of the blocking of Çakıt River by landslide in the investigationarea (Belemedik – Pozantı/Adana), 20 m thick delta-lake facies complex deposits were formed. 4 mainfacies association were identified in Belemedik Delta. First of them is composed of conglomerates havingvaried grain size and sandstones. This facies association shows plannar cross bedding and graded beddingand represents proximal part of the braided river system. The second-facies association consists ofconglomerates, sandstones, siltstones and claystone. Channel geometry is typical in this association.Alternating sand-silt laminations and small scaled cross beddings and ripple marks are abundant nearupper levels. Third facies association represented by siltstone, claystone and sandstone alternations.Ripple laminations and cross beddings are abundant. That facies association shows delta bottom setdeposits. Fourth-facies association is characterized by large lateral extension of plannar or ripplelaminated sediments. Sandstones in this association have fine to very fine grain size. This faciesassociation shows that it occurred to by the deposition of materials like silt and fine sand by turbiditycurrents in the front part of the delta environment (lake environments).