Persian gulf (in history and geography sources of fourth AH/ Tenth Ac)

In iran،s history, Persian Gulf is an eternal truth that history pages always has approved it. One of the most important ages always has approved it. One of the most important ages of iran s history that now has provided the existence of Persian languge and shiids religion, H. forth century / tenth. G., and on the other hand is the golden age of Iran after lslam. In this period because of governing of Samanids and Buyids s government, most of incidents are exposed to the changes of this two political power and also Abbasids governmend. so this alloy comes to exist that whether or not, in this situation, paying attention to areas such as Persian Guolf among historical and geographical sources has been forgoten. In present research has been tried to according to the most important sources of H. forth century, the significant and complete existence of Persian Gulf area and its role in political and economical changes of this era is considered.