Persian Gulf flooding of the basin started 15,000 years ago due to rising sea levels of the Holocene glacial retreat. This inland sea of some is connected to the Gulf of Oman in the east by the Strait of Hormuz; and its western end is marked by the major river delta of the Shatt al-Arab, which carries the waters of the Euphrates and the Tigris. In Iran this is called "Arvand Rood", where "Rood" means "river". Its length is , with Iran covering most of the northern coast and Saudi Arabia most of the southern coast. The Persian Gulf is about wide
Persian Gulf Online Organization Gulf stamps . Persian Gulf Online Organization The Persian Gulf Online Organization (or Persian Gulf Organization PGO, also known as Iranians for International Cooperation (IIC)'s Persian Gulf Task Force or PGTF) is a non-governmental entity consisting of a network of volunteers across the globe dedicated to promoting the name Persian Gulf against the alternative name "Arabian Gulf" in the Persian Gulf naming dispute. Its members live in several countries around the world. PGO's members' efforts are mostly undertaken via the internet. On their website, current news about the Persian Gulf, maps, articles, bibliographies about the Persian Gulf, conferences, and other