<P> Mehrgarh is a Neolithic (7000 BCE to c. 2500 BCE) site to the west of the Indus River valley, near the capital of the Kachi District in Pakistan, on the Kacchi Plain of Balochistan, near the Bolan Pass . According to Ahmad Hasan Dani, professor emeritus at Quaid - e-Azam University, Islamabad, the discovery of Mehrgarh "changed the entire concept of the Indus civilisation (...) There we have the whole sequence, right from the beginning of settled village life ." Mehrgarh is one of the earliest sites with evidence of farming and herding in South Asia . According to Parpola, the culture migrated into the Indus Valley and became the Indus Valley Civilisation . </P> <P> Mehrgarh was influenced by the Near Eastern Neolithic, with similarities between "domesticated wheat varieties, early phases of farming, pottery, other archaeological artefacts, some domesticated plants and herd animals ." Gallego Romero et al. (2011) notice that "(t) he earliest evidence of cattle herding in south Asia comes from the Indus River Valley site of Mehrgarh and is dated to 7,000 YBP ." </P> <P> Lukacs and Hemphill suggest an initial local development of Mehrgarh, with a continuity in cultural development but a change in population . According to Lukacs and Hemphill, while there is a strong continuity between the neolithic and chalcolithic (Copper Age) cultures of Mehrgarh, dental evidence shows that the chalcolithic population did not descend from the neolithic population of Mehrgarh, which "suggests moderate levels of gene flow ." Masacernhas et al. (2015) note that "new, possibly West Asian, body types are reported from the graves of Mehrgarh beginning in the Togau phase (3800 BCE)." </P> <P> The Early Harappan Ravi Phase, named after the nearby Ravi River, lasted from c. 3300 BCE until 2800 BCE . It is related to the Hakra Phase, identified in the Ghaggar - Hakra River Valley to the west, and predates the Kot Diji Phase (2800--2600 BCE, Harappan 2), named after a site in northern Sindh, Pakistan, near Mohenjo - daro . The earliest examples of the Indus script date to the 3rd millennium BCE . </P>

Where do you think the indus valley civilization get its name from