can you name some of the sites from south-asia belonging to this period?
Bhirrana, Mehrgarh, Nausharo and Indus Valley
Chalcolithic
 Bhirrana
india is an international highway of trade and commerce explain with reason It allowed commercial goods to cross borders with relaxed restrictions using innovative transportation of modern times such as pipeline transport, rail routes, automobiles, cargo airlines etc. when did the very first long distance routes for trade emerge? During the Chalcolithic Period what is this period characterized by? Copper, stone, bronze tools
wiki:1607840
Chalcolithic [SEP] South Asia
According to Parpola (2005), ceramic similarities between the Indus Civilization, southern Turkmenistan, and northern Iran during 4300–3300 BC of the Chalcolithic period suggest considerable mobility and trade. The term "Chalcolithic" has also been used in the context of the South Asian Stone Age. In Bhirrana, the earliest Indus civilization site, copper bangles and arrowheads were found. The inhabitants of Mehrgarh in present-day Pakistan fashioned tools with local copper ore between 7000–3300 BC. At the Nausharo site dated to 4500 years ago, a pottery workshop in province of Balochistan, Pakistan, were unearthed 12 blades or blade fragments. These blades are long and and relatively thin.