The Soanian culture is a prehistoric technological culture from the Siwalik Hills in the Indian subcontinent. It is named after the Soan Valley in Pakistan. Soanian sites are found along the Siwalik region in present-day India, Nepal and Pakistan. The Soanian culture has been approximated to have taken place during the Middle Pleistocene period or the mid-Holocene epoch (Northgrippian). Debates still goes on today regarding the exact period occupied by the culture due to artefacts often being found in non-datable surface context. This culture was first discovered and named by the anthropology and archaeology team led by Helmut De Terra and Thomas Thomson Paterson. Soanian artifacts were manufactured on quartzite pebbles, cobbles, and occasionally on boulders, all derived from various fluvial sources on the Siwalik landscape. Soanian assemblages generally comprise varieties of choppers, discoids, scrapers, cores, and numerous flake type tools, all occurring in varying typo-technological frequencies at different sites.
Excluding some localities in the Soan Valley of Pakistan, the site complex of Guler (Beas Valley) and Toka in India, and the Arjun-3 site in Nepal, Soanian and similar assemblages rarely comprise more than a few dozen artifacts. The emergence of Soanian tools has been tied to the local development of boulder conglomerate formation through prehistoric tectonic processes that created convenient transporting system for raw materials.
Recent researches have been focusing on the technological culture's connection with the Harappan culture that originated near the Indus River.
Dating and historical significance
The prehistoric dating of Soanian culture is one that has been debated by scholars due to artefacts being often found in undatable surface contexts. Some argue it is a culture developed by ancient extinct hominids; homo erectus. Others have suggested it is the creation of a group of deurbanized population derived from the Harappan civilization near the Indus alluvial plain. Its artefacts are often found near those of Acheulian culture, which is a homo erectus culture that took place around the same sub-Himalayan culture zone. There is currently no evidence of the two cultures ever crossing path and is believed to have existed in different timeframe. There are currently two main interpretations towards the prehistoric timeframe occupied by the Soanian culture. One sees the Soanian culture as a period that took place in three connecting intervals throughout Middle Pleistocene period (774,000 to 129,000 years ago). The other sees the Soanian culture as a period of single distinct technological culture that may have existed earliest from the mid-Holocene epoch with some artefacts potentially belonging to the Harappan culture.
Three-interval period theory
According to this view, Soanian technological culture evolved throughout three broad intervals during the Middle Pleistocene period from circa 774,000 to 129,000 years ago. Scholars of this view believe the technological culture potentially belonged to the ancient hominid group: homo erectus. The three intervals are known as Pre-Soan, Early Soan, and Late-Soan. The exact dating of these periods is unknown due to tools often being found in undateable surface contexts. This view is developed out of Helmut de Terra and Thomas Thomson Paterson's early work in the Siwalik region. Paterson, in analysing the terrace sequence along the Soan valley in Pakistan, believed that several Soanian technological phases existed within the glacial and interglacial period. Pre-Soan and Early Soanian tools are considered as mostly heavy-duty tools like choppers and core scrapers derived from Lower paleolithic technological culture of the region. These tools contrast with Late-Soan tools which consist of flake tools that are smaller in sizes and for finer purposes.