The source of Halil river comprised the mountainous areas in the north of Jiroft to Jazmourian where is connected with the Persian Sea. In past, the Halil river cultural area has given birth to the civilization of Jiroft. This region was also associated with the civilization known as Marhashi. Survey of Halil river area strengthen this possibility which throughout of the historic period, since beginning of the ancient civilization from the first half of the third millennium B.C up to Islamic era, had been consistent cultural and relational connection between its different regions. In light of above information, present paper has examined this region and its geography, to reveal unexplored archaeological locations, settlements, interactions and communication-routes and its connection with the shores of Persian Sea, during the Protohistoric and Islamic eras. Research Methodology: Source of data from present paper has come from written records and archaeological remains. The information from these sources was evaluated through comparative analysis and descriptive analytical methods by the author. The area of research includes the mountainous areas in north of Jiroft to the littoral shores of Persian Gulf.
Results Discussed in the Paper: A comparative analysis of human activities in the ‘Halil River Cultural’ area between the Protohistoric and the Islamic eras, has revealed that areas in this region were not bound by general historical concept of boundaries in the given time. There were close connections and exchanges within this geographical region over a long period of time from almost identical cultural, social and economic contexts. This region during the Protohistoric and Islamic eras had cultural and trade relations with neighboring Baluchistan, Mesopotamia and Transoxiana (beyond the river (Jeyhun)), Sindh and Africa.
