[2] On the Peruvian side, the sites of Casual and Las Juntas in Bagua, were excavated, as well as at Montegrande and San Isidro in Jaén.

Only archaeologist Julio C. Tello had postulated (circa 1920) an Amazonian origin for Andean culture, but other researchers dismissed this at the time.

[5] On the Ecuadorian side, a spiral architectural structure, similar to Montegrande, was discovered at the Santa Ana-La Florida site in Palanda Canton, and the tomb of an elite personage was found,[3] as well as evidence of cocoa cultivation dating back 5,500 to 5,350 years, in other words 1,500 years older than that earlier found in Mexico.

It is believed to have been a ceremonial temple, with a tomb beneath it of someone important, possibly a healer or a priest, if it follows the pattern of the sites in Palanda and San Isidro.

It is the shape of the snail, or Spondylus, of the Ecuadorian coast, also found in Jaén and Bagua, showing that trade took place between these territories.