They are often distributed along the terraces of old and active river courses and consist of sites of different size and shape, which are sometimes stratified below settlements of later periods.
Rehman Dheri also has a pre Kot Diji phase (RHD1 3300-28 BCE) which are not part of IVC culture.
Unfortunately both these two cultural aspects are very insufficiently radiocarbon dated, though we suggest that they flourished around the middle of the fourth millennium cal BC.
Amri is a stratified mound located in Upper Sindh, alonb the right (western) bankof the Indus.
The knapped stone assemblage is also very typical and does not find parallels in that of the following early Bronze Age Kot Diji aspect.