On the north a parallel one starts from the desert east of Washuk in Kharan District .
On the north a parallel one tends westward toward Dizzak in Iran , where it is known as the Siahan or the Siahan koh .
on the north a parallel one starts from the desert east of Washuk in Kharan District and tends westward toward Dizzak in Iran , where it is known as the Siahan or the Siahan koh .