Sedimentary environment of alluvial terraces south of Khorramabad to Poldokhtar using structural elements (Architectural Elements) and limiting surface (Bounding Surface).

The purpose of this research is to determine the sedimentary environment of alluvial terraces south of Khorramabad to Poldokhter using structural elements and limiting surfaces. In line with this goal, 4 sections were identified and studied. The cuttings are located at distances between 60 and 80 kilometers south of Khorram Abad towards Poldokhter. The studies conducted on these sections lead to the identification of 10 rock facies, including 4 gravelly rock facies (Gm, Gms, Gp, Gt), 4 sandy rock facies (Sm, Sp, St, Sh) and 2 rock facies. Flower (Fsm, Fm), 13 structural elements including (GB, HS, C/S, LHF, LCS, CVs, DIs, TCS, OF, CH, SB, SHF, LIS) and 6 limiting levels of rank 1 to 6 became. According to rock faces, limiting surfaces and structural elements under channel environments, channel bars, point bar, wide cuts (crevasse splay), natural embankments (levee).) and flood plain subenvironment were determined for the alluvial terraces south of Khorramabad to Poldokhtar. Structural elements CH, GB, C/S, LHF, SHF were observed in the studied alluvial barracks in abundance, which indicates a river environment with low twist for the studied alluvial terraces, which alternates between at times, it was attacked by strong and destructive floods, and the coexistence of flood channels indicates that they are periodic.