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 Residency Persian Gulf Residency The Persian Gulf Residency was an official colonial subdivision (i.e., residency) of the British Raj from 1763 until 1947 (and remained British protectorates after Indian independence in 1947, up to 1971), whereby the United Kingdom maintained varying degrees of political and economic control over several states in the Persian Gulf, including what is today known as the United Arab Emirates (formerly called the "Trucial States") and at various times southern portions of Persia, Bahrain, Kuwait, Oman, and Qatar. British interest in the Persian Gulf originated in the sixteenth century and steadily increased as British India's importance rose