Introduction Maroon plain. located in Maroon basin is situated in Khuzestan. and Kohgiluyeh and Boyer-Ahmad provinces; and Jaber plain is positioned in northwest Ilam City in Ilam Province. The existence of Gachsaran Formation and gypsum karstic phenomena (the most important of which are sinkholes) in the mentioned plains. https://www.nacrack.com/great-deal-Sudadera-ch-ndal-roja-23-24-nino-quick-deal/