عنوان مقاله [English]
نویسندگان [English]چکیده [English]
Main objective of this research is comparison between pyroclastic of Malar and Raynah valleys in Yakhar basin in south-east of Damavand volcano. studing of pyroclastic is very important in recognition of Dmavand volcano.this research is based on descriptive – analytical and using Rayneh Topographic map and Geological map of Damavand, G.P.S AND G.I.S Software.A characteristic of the Reyneh deposite is that clasts below 10 cm are mostly light grey and vescular when broken open, while most larger clasts are dark grey to black.Mallar deposite is whiter than Ryneh pumice most of mallar pumices are fall but most of reyenah pumices are flow. .volume of lahar is more in reyenah.