The Ochre Coloured Pottery culture (OCP) is a Bronze Age culture of the Indo-Gangetic Plain "generally dated 2000–1500 BCE," extending from eastern Punjab to northeastern Rajasthan and western Uttar Pradesh. Artefacts of this culture show similarities with both the Late Harappan culture and the Vedic culture. Archaeologist Akinori Uesugi considers it as an archaeological continuity of the previous Harappan Bara style, while according to Parpola, the find of carts in this culture may reflect an Indo-Iranian migration into the India subcontinent, in contact with Late Harappans. The OCP marked the last stage of the North Indian Bronze Age and was succeeded by the Iron Age black and red ware culture and the Painted Grey Ware culture. The 'Ochre Coloured Pottery culture is "generally dated 2000-1500 BCE," Early specimens of the characteristic ceramics found near Jodhpura, Rajasthan, date from the 3rd millennium (this Jodhpura is located in the district of Jaipur and should not be confused with the city of Jodhpur). Several sites of culture flourish along the banks of Sahibi River and its tributaries such as Krishnavati river and Soti river, all originating from the Aravalli range and flowing from south to north-east direction towards Yamuna before disappearing in Mahendragarh district of Haryana. The OCP sites of Atranjikhera, Lal Qila, Jhinjhana and Nasirpur are dated to from 2600 to 1200 BC. The culture reached the Gangetic plain in the early 2nd millennium. Recently, the Archaeological Survey of India discovered copper axes and some pieces of pottery in its excavation at the Saharanpur district of Uttar Pradesh. The pottery had a red slip but gave off an ochre color on the fingers of archaeologists who excavated it, hence the name. It was sometimes decorated with black painted bands and incised patterns. It is often found in association with copper hoards, which are assemblages of copper weapons and other artifacts such as anthropomorphic figures.