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 will seriously affect the position or the rulers of the British government…' The same author also refers to what he terms "political agreements", to which, he says, oil companies’ are all bound… with the British government… in addition to their concession agreements with the rulers…' 'One of the main objects of these', he continues, 'is to ensure that their relations with the rulers in all matters of importance are conducted through, or with, the knowledge of British political officers'. Agents: Chief political residents of the Persian Gulf : Persian Gulf Residency The Persian Gulf Residency was an official colonial subdivision