Complex sentence: The earliest settlement at Mehrgarh--in the northeast corner of the site--was a small farming village dated between 7000 BCE to 5500 BCE and the whole area covers a number of successive settlements.
Split into simpler sentences: The earliest settlement at Mehrgarh, in the northeast corner of the site, was a small farming village that has been dated to between 7000 BCE to 5500 BCE. The whole area covers a number of successive settlements.